DR. DONALD RICHARD KNOTTS MEDICAL DOCTOR
NPI 1790858611
Internal Medicine in Castro Valley, CA
NPI Status: Active since November 16, 2006
Contact Information
20130 LAKE CHABOT RD
SUITE 309
CASTRO VALLEY, CA
ZIP 94546
Phone: (510) 886-3701
Fax: (510) 537-3194
- Individual
- Male
- Internal Medicine
- PECOS Enrolled
About DONALD KNOTTS
This page provides the complete NPI Profile along with additional information for Donald Knotts, an internist established in Castro Valley, California with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1790858611 assigned on November 2006. The practitioner's primary taxonomy code is 207R00000X with license number G33548 (CA). The provider is registered as an individual and his NPI record was last updated 18 years ago.
- NPI
- 1790858611
- Provider Name
- DR. DONALD RICHARD KNOTTS MEDICAL DOCTOR
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 20130 LAKE CHABOT RD SUITE 309 CASTRO VALLEY, CA 94546
- Location Phone
- (510) 886-3701
- Location Fax
- (510) 537-3194
- Mailing Address
- 20130 LAKE CHABOT RD SUITE 309 CASTRO VALLEY, CA 94546
- Mailing Phone
- (510) 886-3701
- Mailing Fax
- (510) 537-3194
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 11-16-2006
- Last Update Date
- 07-09-2007
- Code Navigator
An internist like Donald Knotts 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.
- G33548
- 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 |
|---|---|---|---|
| 00G355480 | MEDICARE PIN (08) | CA | |
| A46397 | MEDICARE UPIN (02) | CA | |
| 00G355480 | MEDICAID (05) | CA |
Medicare Participation & PECOS Enrollment Status
Donald Knotts 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
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
Physician Visit Costs
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 94546 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 | 7 | 9 | 0 | 8 | 5 | 8 | 6 | 1 | 1 |
| Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
| 2 | 7 | 18 | 0 | 16 | 5 | 16 | 6 | 2 | |
| Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
| 2 + 7 + 1 + 8 + 0 + 1 + 6 + 5 + 1 + 6 + 6 + 2 + 24 = 69 | |||||||||
| Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
| 70 - 69 = 1 | 1 | ||||||||
The NPI number 1790858611 is valid because the calculated check digit 1 using the Luhn validation algorithm matches the last digit of the original NPI number.
Other Providers at the Same Location
The following 8 providers are registered at the same or nearby location.
| NPI | Name / Type | Taxonomy | Address |
|---|---|---|---|
| 1376569475 | MARCIA C PECK MD Individual | Internal Medicine (Endocrinology, Diabetes & Metabolism) | 20130 LAKE CHABOT RD SUITE 201 CASTRO VALLEY, CA 94546 (510) 204-2574 |
| 1316959299 | BENJAMIN WOLSZTEJN, MD INC Organization | Obstetrics & Gynecology | 20130 LAKE CHABOT RD SUITE 306 CASTRO VALLEY, CA 94546 (510) 581-7666 |
| 1871648188 | ASSOCIATEDUROLOGY MEDICAL GROUP,INC. Organization | Urology | 20130 LAKE CHABOT RD # 302 CASTRO VALLEY, CA 94546 (510) 889-1700 |
| 1851439145 | PATTI LACEY HEE PA-C Individual | Physician Assistant | 20130 LAKE CHABOT RD SUITE #202 CASTRO VALLEY, CA 94546 (510) 582-6424 |
| 1346529617 | KENNETH L. ROTHMAN, M.D., INC. Organization | Clinic/Center (Primary Care) | 20130 LAKE CHABOT RD SUITE 202 CASTRO VALLEY, CA 94546 (510) 582-6424 |
| 1649275330 | DR. LOUISE HOM M.D. Individual | Surgery | 20130 LAKE CHABOT RD STE 202 CASTRO VALLEY, CA 94546 (510) 583-8192 |
| 1750589560 | DONALD R. KNOTTS, M.D. INC Organization | Clinic/Center (Medical Specialty) | 20130 LAKE CHABOT RD SUITE 309 CASTRO VALLEY, CA 94546 (510) 886-3701 |
| 1013415876 | TONY HO PA-C Individual | Physician Assistant | 20130 LAKE CHABOT RD CASTRO VALLEY, CA 94546 (510) 889-1700 |
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1790858611, enumerated in the NPI registry as an "individual" on November 16, 2006
The provider is located at 20130 Lake Chabot Rd Suite 309 Castro Valley, Ca 94546 and the phone number is (510) 886-3701
The provider's speciality is Internal Medicine with taxonomy code 207R00000X
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.
This NPI record was last updated on November 16, 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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