Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1972787174 Individual Practitioner Female Practitioner

Dr. Tammy T Chang , MD, PhD

Surgery • San Francisco, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Tammy Chang, MD, PhD is a certified Surgery practicing in San Francisco, CA. With approximately 23 years of clinical experience since graduating from Harvard Medical School in 2003, Dr. Chang delivers high-quality medical care to the local community at 513 PARNASSUS AVE.

Dr. Chang is affiliated with Ucsf Dept Of Surgery and accepts Medicare assignment.

Frequently performed procedures and clinical services include insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older, fluoroscopic guidance for insertion, replacement or removal of central venous access device, ultrasonic guidance for blood vessel access. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

513 Parnassus Ave
S321

San Francisco, CA 941430470

Telephone 4154761239
Fax 4155021259
Associated Practice Facility / Clinic

Medicare Profile & Education

Medical School

Harvard Medical School

Graduation Year

2003

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in San Francisco, CA

Senior Veteran Specialist (>20 Yrs)
Practitioner Clinical Experience
23 Yrs -0.6 yrs vs City Avg
City Avg: 23.6 Yrs
State Avg: 27.4 Yrs
Regional Practice Density
207 Specialists

Practicing in San Francisco, CA (3346 Statewide)

Telehealth Adoption Rate
19.8% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
95.2% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Chang (23 Years) 23 Yrs
San Francisco Specialty Average (23.6 Years) 23.6 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)
Reporting Year:
HCPCS Code & Description Services Patients Submitted Charge Medicare Allowed
36561 Insertion of central venous catheter and implanted device for infusion beneath the skin, patient 5 years or older
23 23 $8123.00 $372.25
77001 Fluoroscopic guidance for insertion, replacement or removal of central venous access device
22 22 $124.00 $19.33
76937 Ultrasonic guidance for blood vessel access
21 21 $103.24 $14.92
99152 Moderate sedation services by physician also performing a procedure, patient 5 years of age or older, first 15 minutes
18 18 $321.00 $13.14

Medical Specialties & State Licenses

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License CA A90279

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.

Hospital & Practice Group Affiliations

Ucsf Dept Of Surgery

505 Parnassus Ave, San Francisco, CA 941432204

Phone: 4154761000

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners
NPI 1003278102

Doctor of Medicine (M.D.), Doctor of Philosophy (Ph.D.)

NPI 1003445123
Jonathan Ejie

Student in an Organized Health Care Education/Training Program

NPI 1003754664
Samantha Hoffman

Student in an Organized Health Care Education/Training Program

NPI 1013855675
Dr. Patricia Hooper , MD

Student in an Organized Health Care Education/Training Program

NPI 1023308756

Doctor of Medicine (M.D.)

NPI 1023868106

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events
NPI Profile Active December 24, 2007

NPI status registered as active in NPPES database

📍
Updated Practice Location December 24, 2007

Registered at 513 PARNASSUS AVE, S321, SAN FRANCISCO, CA 941430470 (Tel: 4154761239)

📍
Updated Business Mailing Address December 24, 2007

Registered at 513 PARNASSUS AVE, S321, SAN FRANCISCO, CA 941430470 (Tel: 4154761239)

👤
Provider Name / Credentials Updated December 24, 2007

Recorded as TAMMY CHANG, M.D., PH.D.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) December 24, 2007

Surgery (License #A90279 in CA)

🟢
Initial NPI Registration & Enumeration December 24, 2007

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1972787174
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: December 24, 2007
Last Update: December 24, 2007
Sole Proprietor: No

Mailing Address

513 Parnassus Ave, S321

San Francisco, CA 941430470

Phone: 4154761239

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.