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DR. TAMMY T CHANG M.D., PH.D.
NPI 1972787174
Surgery in San Francisco, CA

Active since December 24, 2007PECOS EnrolledAccepts Medicare Assignment
513 PARNASSUS AVE, S321, SAN FRANCISCO, CA 94143(415) 476-1239(415) 502-1259 Get Directions Write a Review

NPPES record last updated: December 24, 2007. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Tammy T Chang M.d., Ph.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. TAMMY T CHANG M.D., PH.D. (NPI 1972787174) is an individual surgery provider in San Francisco, California, licensed in California (A90279) and active in the NPI registry since December 2007. She is enrolled in Medicare PECOS and is a graduate of Harvard Medical School (2003).

NPPES Registry Identity

NPI1972787174
Entity TypeIndividualFemale
Primary Taxonomy208600000X
Provider Legal NameDR. TAMMY T CHANGCredential: M.D., PH.D.
Location Address513 PARNASSUS AVE, S321San Francisco, CA 94143-0470
Mailing Address513 Parnassus Ave, S321San Francisco, CA 94143-0470 · (415) 476-1239 · Fax (415) 502-1259
Phone(415) 476-1239
Fax(415) 502-1259
Sole ProprietorNo
Medical School CMSHarvard Medical SchoolGraduated 2003
Enumeration DateDecember 24, 2007
✔ NPI 1972787174 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in CA · A90279
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
513 PARNASSUS AVE, San Francisco, CA 94143
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Tammy T Chang M.d., Ph.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID840314498
PECOS Enrollment IDI20100902000965
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Insertion of central venous tube with port (5 years or older) 36561
A central venous tube with port is a small, flexible tube inserted into a large vein, usually in the chest. It allows for easy administration of medication, fluids, or blood products over a long period. A port is attached under the skin for easy access. It's safe for individuals aged 5 and above.
23 services23 patients
Fluoroscopic guidance for insertion or removal of central vein access device 77001
Fluoroscopic guidance for central vein access device insertion or removal is a procedure where a special X-ray, called a fluoroscope, is used to help accurately place or remove a device in a central vein. This device aids in delivering medications or collecting blood samples.
22 services22 patients
Ultrasonic guidance for blood vessel access 76937
Ultrasonic guidance for blood vessel access is a medical procedure where sound waves are used to create images of your blood vessels. This helps doctors to accurately locate and access the vessels for treatments or tests, ensuring safety and precision.
21 services21 patients
Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152
This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.
18 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94143 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Standard wheelchair K0001
DME-Wheelchairs · category DD000N
1 supplier12 claims12 services$10.89 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ELLIOTT SCOTT SEELEY M.D., PH.D.
Pathology (Molecular Genetic Pathology)
513 PARNASSUS AVE, HSW4, SUITE 450A
SAN FRANCISCO, CA 94143
San Francisco County (415) 514-0738
DR. LAURA WONG M.D./PH.D.
Plastic Surgery
513 PARNASSUS AVE, S-321
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-1239
ALAN ZAMBELI-LJEPOVIC
Surgery
513 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-1239
UCSF MEDICAL CENTER
General Acute Care Hospital
513 PARNASSUS AVE, BOX 0427
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-3235
WILLIAM MCKLEROY M.D
Internal Medicine (Pulmonary Disease)
513 PARNASSUS AVE, HSE1314
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-0735
MS. MELICENT CLARE PECK M.D., PHD
Internal Medicine (Infectious Disease)
513 PARNASSUS AVE, S-380, BOX 0654
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-9362
DR. SCOTT R. VANDENBERG MD
Pathology (Neuropathology)
513 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 502-7796
DR. CHEIKH NJIE MD
Internal Medicine (Gastroenterology)
513 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 502-4444

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Tammy Chang's NPI number?

The NPI number for Tammy Chang is 1972787174. It was assigned to this individual provider in the NPPES registry on December 24, 2007.

Where is Tammy Chang located?

Tammy Chang practices at 513 Parnassus Ave S321, San Francisco, CA 94143. The listed phone number is (415) 476-1239.

What is Tammy Chang's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Tammy Chang enrolled in Medicare?

Yes. Tammy Chang is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Tammy Chang was last updated on December 24, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.