ANNIE BERTHA-CHAO CHERN M.D.
NPI 1104051507
Family Medicine in San Jose, CA

NPI Status: Active since May 29, 2009

Contact Information

455 OCONNOR DR
SUITE 210
SAN JOSE, CA
ZIP 95128
Phone: (408) 995-5453

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  • Individual
  • Female
  • Years of Experience 19
  • Family Medicine
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About ANNIE CHERN

This page provides the complete NPI Profile along with additional information for Annie Chern, a primary care provider established in San Jose, California with a medical specialization in Family Medicine and more than 19 years of experience. She graduated from Stanford University School Of Medicine in 2007. The healthcare provider is registered in the NPI registry with number 1104051507 assigned on May 2009. The practitioner's primary taxonomy code is 207Q00000X with license number A107270 (CA). The provider is registered as an individual and her NPI record was last updated 14 years ago.

NPI
1104051507
Provider Name
ANNIE BERTHA-CHAO CHERN M.D.
Gender
Female
Entity Type
Individual
Location Address
455 OCONNOR DR SUITE 210 SAN JOSE, CA 95128
Location Phone
(408) 995-5453
Mailing Address
455 OCONNOR DR SUITE 210 SAN JOSE, CA 95128
Mailing Phone
(408) 995-5453
Medical School Name
STANFORD UNIVERSITY SCHOOL OF MEDICINE
Graduation Year
2007
Is Sole Proprietor?
Yes
Enumeration Date
05-29-2009
Last Update Date
02-03-2012
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A primary care provider (PCP) like Annie Chern sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, 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

Family Medicine

Taxonomy Code
207Q00000X
Type
Allopathic & Osteopathic Physicians
License No.
A107270
License State
CA
Taxonomy Description
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

Medicare Participation & PECOS Enrollment Status

Annie Chern 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.

Annie Chern 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: 5890971972

    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: I20110526000144

    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

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

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 16 times for 16 patients

Established patient office or other outpatient visit, 20-29 minutes

This 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 22 times for 17 patients

Established patient office or other outpatient visit, 30-39 minutes

This 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 58 times for 30 patients

Follow-up hospital inpatient care per day, typically 15 minutes

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

This service was performed 36 times for 25 patients

Follow-up hospital inpatient care per day, typically 25 minutes

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

This service was performed 57 times for 35 patients

Hospital discharge day management, 30 minutes or less

Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.

This service was performed 21 times for 21 patients

Initial hospital inpatient care per day, typically 70 minutes

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

This service was performed 25 times for 25 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $26.61 for a new patient copayment and $30.44 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 95128 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99203

  • Average New Patient Price $106.47
  • Minimum New Patient Price $70.37
  • Maximum New Patient Price $206.04
  • Average New Patient Copayment $26.61
  • Minimum New Patient Copayment $17.59
  • Maximum New Patient Copayment $51.51

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

  • Average Established Patient Price $121.77
  • Minimum Established Patient Price $23.96
  • Maximum Established Patient Price $169.6
  • Average Established Patient Copayment $30.44
  • Minimum Established Patient Copayment $5.99
  • Maximum Established Patient Copayment $42.4

* 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.

Reviews for ANNIE BERTHA-CHAO CHERN M.D.

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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.
1104051507
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
210405250
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 1 + 0 + 4 + 0 + 5 + 2 + 5 + 0 + 24 = 43
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
50 - 43 = 77

The NPI number 1104051507 is valid because the calculated check digit 7 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location


The following 20 providers are registered at the same or nearby location.

NPI Name / Type Taxonomy Address
1861456246 GEORGE PETER KENT MD
Individual
Family Medicine455 OCONNOR DR SUITE 210
SAN JOSE, CA 95128
(408) 995-5453
1376581934 BRUCE R HUFFER MD
Individual
Orthopaedic Surgery455 OCONNOR DR SUITE 310
SAN JOSE, CA 95128
(408) 271-4908
1942238241DR. PETER J SCHUBART MD, PHD
Individual
Surgery (Vascular Surgery)455 OCONNOR DR SUITE 370
SAN JOSE, CA 95128
(408) 292-7202
1245263458ANTHONY J. SAGLIMBENI, M.D., INC
Organization
Internal Medicine455 OCONNOR DR SUITE 150
SAN JOSE, CA 95128
(408) 293-7767
1275626897DR. RANDAL TANH PHAM M.D.
Individual
Specialist455 OCONNOR DR SUITE 180B
SAN JOSE, CA 95128
(408) 998-1818
1184700890 ROBERT NORMAN M.D.
Individual
Family Medicine455 OCONNOR DR STE210
SAN JOSE, CA 95128
(408) 995-5453
1538245105DR. FRANCES SUN M.D.
Individual
Family Medicine (Geriatric Medicine)455 OCONNOR DR STE 210
SAN JOSE, CA 95128
(408) 995-5453
1881770428DR. ANDREW D. SCHECHTMAN M.D.
Individual
Family Medicine455 OCONNOR DR SUITE 210
SAN JOSE, CA 95128
(408) 995-5453
1922184506 MICHAEL STEVENS M.D.
Individual
Family Medicine455 OCONNOR DR STE 210
SAN JOSE, CA 95128
(408) 995-5453
1316023005 MICHELLE MAXEY M.D.
Individual
Family Medicine455 OCONNOR DR SUITE 210
SAN JOSE, CA 95128
(408) 995-5453
1174609788DR. DALJEET RAI M.D.
Individual
Family Medicine455 OCONNOR DR STE 210
SAN JOSE, CA 95128
(408) 995-5453
1588794440MR. AARON JOHN NEIBEL P.T.A., CSCS
Individual
Physical Therapy Assistant455 OCONNOR DR
SAN JOSE, CA 95128
(408) 293-7767
1831219344MR. HARLAND WONG OPAC
Individual
Physician Assistant (Surgical)455 OCONNOR DR SUITE 310 B
SAN JOSE, CA 95128
(408) 297-2833
1245350123MS. KAVITA JOANNA NOBLE CNM
Individual
Advanced Practice Midwife455 OCONNOR DR STE 300
SAN JOSE, CA 95128
(408) 387-4441
1356522239M. TRANDUC M.D., INC
Organization
Surgery455 OCONNOR DR SUITE 370
SAN JOSE, CA 95128
(408) 288-9900
1699959320MR. PAUL-WAYNE JOHNSON MAHLOW MA, ATC, CSCS
Individual
Specialist/Technologist (Athletic Trainer)455 OCONNOR DR SUITE 150
SAN JOSE, CA 95128
(408) 293-7767
1033349998DR. AMY G WATSON MD
Individual
Family Medicine455 OCONNOR DR SUITE 200
SAN JOSE, CA 95128
(408) 283-7676
1760795678ALDON J. HILTON DDS
Organization
Durable Medical Equipment & Medical Supplies (Customized Equipment)455 OCONNOR DR 320
SAN JOSE, CA 95128
(408) 971-9600
1265727952AUSTIN POWER, APC
Organization
Internal Medicine (Nephrology)455 OCONNOR DR SUITE 290
SAN JOSE, CA 95128
(408) 998-5400
1871868562O' CONNOR FAMILY MEDICINE RESIDENCY PROGRAM
Organization
Clinic/Center (Community Health)455 OCONNOR DR
SAN JOSE, CA 95128
(408) 283-7676

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1104051507, enumerated in the NPI registry as an "individual" on May 29, 2009

The provider is located at 455 Oconnor Dr Suite 210 San Jose, Ca 95128 and the phone number is (408) 995-5453

The provider's speciality is Family Medicine with taxonomy code 207Q00000X

The provider has more than 19 years of experience. She graduated from Stanford University School Of Medicine in 2007.

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 $106.47 with an average copayment of $26.61 for new patient appointments. Established patients should expect a typical charge of $121.77 and an average copayment of 30.44. 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, Established patient office or other outpatient visit, 20-29 minutes, Established patient office or other outpatient visit, 30-39 minutes, Follow-up hospital inpatient care per day, typically 15 minutes, Follow-up hospital inpatient care per day, typically 25 minutes, Hospital discharge day management, 30 minutes or less and Initial hospital inpatient care per day, typically 70 minutes.

This NPI record was last updated on May 29, 2009. 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].
NPI Profile data is regularly updated with the latest NPI registry information, if you would like to update or remove your NPI Profile in this website please contact us.