SIMIN SIDDIQ M.D.
NPI 1255362422
Internal Medicine in Fremont, CA
NPI Status: Active since July 06, 2006
Contact Information
2333 MOWRY AVE
SUITE 300
FREMONT, CA
ZIP 94538
Phone: (510) 796-0222
Fax: (510) 796-7760
- Individual
- Female
- Years of Experience 49
- Internal Medicine
- Accepts Medicare Approved Payment
- PECOS Enrolled
About SIMIN SIDDIQ
This page provides the complete NPI Profile along with additional information for Simin Siddiq, an internist established in Fremont, California with a medical specialization in Internal Medicine and more than 49 years of experience. The healthcare provider is registered in the NPI registry with number 1255362422 assigned on July 2006. The practitioner's primary taxonomy code is 207R00000X with license number A38666 (CA). The provider is registered as an individual and her NPI record was last updated 15 years ago.
- NPI
- 1255362422
- Provider Name
- SIMIN SIDDIQ M.D.
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 2333 MOWRY AVE SUITE 300 FREMONT, CA 94538
- Location Phone
- (510) 796-0222
- Location Fax
- (510) 796-7760
- Mailing Address
- 2333 MOWRY AVE SUITE 300 FREMONT, CA 94538
- Mailing Phone
- (510) 796-0222
- Mailing Fax
- (510) 796-7760
- Medical School Name
- OTHER
- Graduation Year
- 1977
- Is Sole Proprietor?
- No
- Enumeration Date
- 07-06-2006
- Last Update Date
- 04-15-2010
- Code Navigator
An internist like Simin Siddiq is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.
Location Map
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Internal Medicine
- Taxonomy Code
- 207R00000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- A38666
- License State
- CA
- Taxonomy Description
- A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Additional Identifiers
The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.
Identifier | Type / Code | Identifier State | Identifier Issuer |
---|---|---|---|
00A38666 | MEDICARE ID-TYPE UNSPECIFIED (04) | CA | |
A28689 | MEDICARE UPIN (02) | CA | |
00A38666 | MEDICAID (05) | CA |
Medicare Participation & PECOS Enrollment Status
Simin Siddiq is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.
Simin Siddiq is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.
What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.
Is the provider registered in PECOS? Yes
PECOS PAC ID: 1658282454
What is the PECOS Associate Control ID?
A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.PECOS Enrollment ID: I20050428000533
What is the Provider Enrollment ID?
The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.Accepts Medicare Assignment? Yes
What does it mean "accepts medicare assignment"?
When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes
Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes
Eligible to Order or Refer a Home Health Agency (HHA): Yes
Eligible to Order or Refer Power Mobility Devices: Yes
Provider Referred Orders for Durable Medical Equipment, Devices & Supplies
The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.
Durable Medical Equipment
DME-Other DME (DE017N)
Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips (HCPCS:A4253)
13 DME suppliers used 33 Medicare Claims 72 Services Paid
DME-Medical/Surgical Supplies (DA000N)
Lancets, per box of 100 (HCPCS:A4259)
7 DME suppliers used 12 Medicare Claims 18 Services Paid
DME-Other DME (DE017N)
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service (HCPCS:K0553)
1 DME suppliers used 11 Medicare Claims 11 Services Paid
Areas of Expertise
The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
Blood test, comprehensive group of blood chemicals
Blood test, lipids (cholesterol and triglycerides)
Blood test, thyroid stimulating hormone (tsh)
Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count
Complete x-ray of body bones
Dxa bone density measurement of hip, pelvis, spine
Established patient office or other outpatient visit, 20-29 minutes
Established patient office or other outpatient visit, 30-39 minutes
Hemoglobin a1c level
Insertion of needle into vein for collection of blood sample
Thyroxine (thyroid chemical), free
Vitamin d-3 level
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
This service was performed 57 times for 57 patientsA comprehensive group of blood chemicals test, also known as a comprehensive metabolic panel, is a blood test that measures your sugar level, electrolyte and fluid balance, kidney function, and liver function. This helps to check your body's overall health.
This service was performed 45 times for 40 patientsA lipid panel is a blood test that measures fats and fatty substances, such as cholesterol and triglycerides. These substances are used by your body as a source of energy. High levels can lead to health issues, including heart disease.
This service was performed 36 times for 33 patientsA TSH blood test measures the level of thyroid stimulating hormone in your body. This hormone is produced by the pituitary gland and regulates how your thyroid works. It's a simple procedure where a small amount of blood is drawn from your arm for analysis.
This service was performed 30 times for 28 patientsChronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.
This service was performed 37 times for 19 patientsA Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.
This service was performed 40 times for 38 patientsA complete x-ray of body bones is a diagnostic procedure that uses radiation to create images of your bones. This test can help detect fractures, infections, or other bone abnormalities. You'll need to stay still during the process to ensure clear images. It's a non-invasive and generally quick procedure.
This service was performed 32 times for 32 patientsA DXA bone density measurement is a simple, quick, and non-invasive procedure that assesses the strength of your bones. This test uses X-rays to measure the amount of minerals, mainly calcium, in the hip, pelvis, and spine. It helps in early detection of osteoporosis or other bone diseases.
This service was performed 32 times for 32 patientsThis is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
This service was performed 369 times for 114 patientsThis is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
This service was performed 226 times for 96 patientsHemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.
This service was performed 16 times for 14 patientsThis procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
This service was performed 53 times for 47 patientsThe Thyroxine (thyroid chemical), free test is a blood test that measures the level of free T4 in your body. T4 is a hormone produced by your thyroid gland and is essential for growth and metabolism. If your T4 levels are too high or too low, it could indicate a thyroid disorder.
This service was performed 28 times for 26 patientsA Vitamin D-3 level test measures the amount of Vitamin D-3, a crucial nutrient, in your body. This test helps identify if your levels are too low or too high. Low levels may lead to bone weakness, while high levels could harm your kidneys. It's a simple blood test.
This service was performed 22 times for 21 patientsPhysician Visit Costs
The typical physician office visit costs for Medicare beneficiaries in this area are: $38.45 for a new patient copayment and $29.87 for an established patient copayment.
The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.
For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.
The prices below reflect the costs for new and established patients in the 94538 ZIP code area.
New Patients Visit Costs *
The most utilized procedure code for new patients office visits is 99204
- Average New Patient Price $153.83
- Minimum New Patient Price $69
- Maximum New Patient Price $202.35
- Average New Patient Copayment $38.45
- Minimum New Patient Copayment $17.25
- Maximum New Patient Copayment $50.58
Established Patients Visit Costs *
The most utilized procedure code for established patients office visits is 99214
- Average Established Patient Price $119.48
- Minimum Established Patient Price $23.44
- Maximum Established Patient Price $166.46
- Average Established Patient Copayment $29.87
- Minimum Established Patient Copayment $5.86
- Maximum Established Patient Copayment $41.61
* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.
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NPI Validation Check Digit Calculation
The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.
Start with the original NPI number, the last digit is the check digit and is not used in the calculation. | |||||||||
1 | 2 | 5 | 5 | 3 | 6 | 2 | 4 | 2 | 2 |
Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
2 | 2 | 10 | 5 | 6 | 6 | 4 | 4 | 4 | |
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
2 + 2 + 1 + 0 + 5 + 6 + 6 + 4 + 4 + 4 + 24 = 58 | |||||||||
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
60 - 58 = 2 | 2 |
The NPI number 1255362422 is valid because the calculated check digit 2 using the Luhn validation algorithm matches the last digit of the original NPI number.
Other Providers at the Same Location
The following 17 providers are registered at the same or nearby location.
NPI | Name / Type | Taxonomy | Address |
---|---|---|---|
1386669489 | CARL JEFFREY CARLSON M.D. Individual | Internal Medicine (Cardiovascular Disease) | 2333 MOWRY AVE SUITE 220 FREMONT, CA 94538 (510) 792-2012 |
1154344919 | DR. ASHIT JAIN M.D. Individual | Internal Medicine (Cardiovascular Disease) | 2333 MOWRY AVE SUITE 300 FREMONT, CA 94538 (510) 796-0222 |
1477667285 | DR. LAY-HWA LOU MD Individual | Internal Medicine | 2333 MOWRY AVE SUITE 300 FREMONT, CA 94538 (510) 796-0222 |
1922114180 | DR. CAROLINE ORTIZ GARCIA MD Individual | Family Medicine | 2333 MOWRY AVE SUITE 300 FREMONT, CA 94538 (510) 796-0222 |
1114016292 | FRANK PETER HOCHMAN M.D. Individual | Family Medicine | 2333 MOWRY AVE SUITE 300 FREMONT, CA 94538 (510) 797-2939 |
1760549109 | DR. SYLVIA HANH HOANG M.D. Individual | Family Medicine | 2333 MOWRY AVE SUITE 300 FREMONT, CA 94538 (510) 796-0222 |
1043273295 | DR. SCOTT KRAMER M.D. Individual | Obstetrics & Gynecology (Gynecology) | 2333 MOWRY AVE SUITE 201 FREMONT, CA 94538 (510) 796-0510 |
1225386642 | CALIFORNIA CARDIOVASCULAR Organization | Internal Medicine | 2333 MOWRY AVE SUITE 300 FREMONT, CA 94538 (510) 796-0222 |
1932202959 | CALIFORNIA CARDIOVASCULAR CONSULTANTS Organization | Internal Medicine | 2333 MOWRY AVE SUITE 300 FREMONT, CA 94538 (510) 796-0222 |
1295952034 | GEORGANN GERVASI-LYTTKENS PA-C, R.D.C.S.,R.V.T Individual | Physician Assistant (Medical) | 2333 MOWRY AVE SUITE #220 FREMONT, CA 94538 (510) 792-2012 |
1295780542 | DR. EDWARD JOHN MEYER M.D. Individual | Internal Medicine (Endocrinology, Diabetes & Metabolism) | 2333 MOWRY AVE STE 300 FREMONT, CA 94538 (530) 899-9112 |
1316024508 | SHAKIR HYDER M.D. Individual | Internal Medicine (Gastroenterology) | 2333 MOWRY AVE SUITE 300 FREMONT, CA 94538 (510) 796-0222 |
1407945777 | DR. SEEMA RIKHY MD Individual | Internal Medicine | 2333 MOWRY AVE SUITE 300 FREMONT, CA 94538 (510) 796-0222 |
1972732600 | CHRISTINE NGUYEN ELIAS M.D. Individual | Internal Medicine (Rheumatology) | 2333 MOWRY AVE STE 300 FREMONT, CA 94538 (510) 796-0222 |
1144221953 | DR. PADMAVATHI KUDARAVALLI MD Individual | Internal Medicine | 2333 MOWRY AVE STE 300 FREMONT, CA 94538 (510) 284-4100 |
1053401125 | MICHELLE HTUN M.D Individual | Internal Medicine | 2333 MOWRY AVE SUITE # 300 FREMONT, CA 94538 (510) 796-0222 |
1871356683 | THO BOI TRINH NP Individual | Nurse Practitioner (Family) | 2333 MOWRY AVE FREMONT, CA 94538 (510) 796-0222 |
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1255362422, enumerated in the NPI registry as an "individual" on July 06, 2006
The provider is located at 2333 Mowry Ave Suite 300 Fremont, Ca 94538 and the phone number is (510) 796-0222
The provider's speciality is Internal Medicine with taxonomy code 207R00000X
The provider has more than 49 years of experience.
The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to make sure your health plan is currently accepted.
Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.
Medicare beneficiaries should expect a typical cost of $153.83 with an average copayment of $38.45 for new patient appointments. Established patients should expect a typical charge of $119.48 and an average copayment of 29.87. Please review your insurance plan or contact the provider directly to determine your specific costs.
The most common procedures or services performed by this practitioner are: Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit, Blood test, comprehensive group of blood chemicals, Blood test, lipids (cholesterol and triglycerides), Blood test, thyroid stimulating hormone (tsh), Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month, Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count, Complete x-ray of body bones, Dxa bone density measurement of hip, pelvis, spine, Established patient office or other outpatient visit, 20-29 minutes, Established patient office or other outpatient visit, 30-39 minutes, Hemoglobin a1c level, Insertion of needle into vein for collection of blood sample, Thyroxine (thyroid chemical), free and Vitamin d-3 level.
This NPI record was last updated on July 06, 2006. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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