Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1316966138 Individual Practitioner Male Practitioner

Dr. David F Chang , MD

Ophthalmology • Los Altos, CA

Professional Overview & Biography Verified Profile Summary

Dr. David Chang, MD is a certified Ophthalmology practicing in Los Altos, CA. With approximately 46 years of clinical experience since graduating from Harvard Medical School in 1980, Dr. Chang delivers high-quality medical care to the local community at 762 ALTOS OAKS DR.

Dr. Chang is affiliated with David F Chang M D Inc and does not directly accept Medicare assignment.

Frequently performed procedures and clinical services include measurement of corneal curvature and depth of eye, removal of cataract with insertion of lens, new patient complete exam of visual system. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

762 Altos Oaks Dr

Los Altos, CA 940245434

Telephone 6509489123
Fax 6509480563
Associated Practice Facility / Clinic
🏢 Altos Optical Co Inc Facility NPI 1275641706

Medicare Profile & Education

Medical School

Harvard Medical School

Graduation Year

1980

Medicare Assignment

Not Specified

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Ophthalmology in Los Altos, CA

Senior Veteran Specialist (>20 Yrs)
Practitioner Clinical Experience
46 Yrs +14.6 yrs vs City Avg
City Avg: 31.4 Yrs
State Avg: 29.5 Yrs
Regional Practice Density
7 Specialists

Practicing in Los Altos, CA (3116 Statewide)

Telehealth Adoption Rate
0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
15.1% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Chang (46 Years) 46 Yrs
Los Altos Specialty Average (31.4 Years) 31.4 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
92136 Measurement of corneal curvature and depth of eye
1,192 813 $55.74 $47.73
66984 Removal of cataract with insertion of lens
940 605 $756.91 $635.61
92004 New patient complete exam of visual system
588 588 $205.70 $177.98
92014 Established patient complete exam of visual system
138 138 $175.06 $151.99
92134 Imaging of retina
106 106 $55.99 $45.29
66982 Complex removal of cataract with insertion of prosthetic lens
103 76 $992.90 $860.94
66821 Removal of recurring cataract in lens capsule using a laser
99 92 $434.37 $368.66
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
92 92 $217.82 $189.20
92133 Imaging of optic nerve
23 23 $50.43 $41.26
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
21 21 $209.39 $147.01
66991 Extracapsular removal of cataract with insertion of artificial lens and insertion of drainage device in front chamber of eye
13 11 $905.03 $782.30

Medical Specialties & State Licenses

Ophthalmology Primary Specialty

NUCC Taxonomy Code: 207W00000X

State License CA G045581

An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID
00G455810 (CA)

Hospital & Practice Group Affiliations

David F Chang M D Inc

762 Altos Oaks Dr, Los Altos, CA 940245435

Phone: 6509489123

Practice Associates & Co-Workers

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

4 Associated Practitioners
NPI 1316963507

Doctor of Medicine (M.D.)

NPI 1437336609

Doctor of Medicine (M.D.), JD

Dr. Stephanie Chen , MD

Ophthalmology - Cornea and External Diseases Specialist

NPI 1629572136

Doctor of Medicine (M.D.)

NPI 1669491486

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 May 05, 2015

NPI status registered as active in NPPES database

📍
Updated Practice Location May 05, 2015

Registered at 762 ALTOS OAKS DR, LOS ALTOS, CA 940245434 (Tel: 6509489123)

📍
Updated Business Mailing Address May 05, 2015

Registered at 762 ALTOS OAKS DR, LOS ALTOS, CA 940245434 (Tel: 6509489123)

👤
Provider Name / Credentials Updated May 05, 2015

Recorded as DAVID CHANG, M.D.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) May 05, 2015

Ophthalmology (License #G045581 in CA)

🟢
Initial NPI Registration & Enumeration July 19, 2006

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: 1316966138
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: July 19, 2006
Last Update: May 05, 2015
Sole Proprietor: Yes

Mailing Address

762 Altos Oaks Dr

Los Altos, CA 940245434

Phone: 6509489123

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.