What is David Chang's specialty?

David Chang (NPI 1316966138) is a Medicare-billing provider whose primary specialty is Ophthalmology in Los Altos, CA.

Where does David Chang practice?

David Chang practices in Los Altos, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1316966138.

How much does Medicare pay David Chang?

David Chang (NPI 1316966138) received approximately $758K in total Medicare Part B payments, serving 980 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1316966138

David ChangM.D.

OphthalmologyLos Altos, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

2,565

Unique beneficiaries

—

Total services

3,315

Distinct HCPCS

Medicare payment

$742K

Peer benchmark

Total Medicare services vs. 2,144 Ophthalmology providers in CA — above median (cohort median 1,859).

PRESCRIBING · PART D · 2024

Total Rx claims

492

Beneficiaries

—

Total drug cost

$19K

Distinct drugs

Brand share

18.3%

Top prescribed drugs

Diclofenac Sodium173 claims

Prednisolone Acetate128 claims

Polymyxin B Sulf/Trimethoprim54 claims

Loteprednol Etabonate38 claims

Timolol Maleate25 claims

QUALITY · MIPS · 2024

Final MIPS score

75.0

Quality

0.0

Cost

79.5

Improvement activities

0.0

Promoting interop.

0.0

Payment adjustment

0.00%

Individual

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$99K

Payment records

By payment type

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$65K

Consulting Fee$33K

Food and Beverage$810

Travel and Lodging$585

Top paying entities

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$65K

Consulting Fee$33K

Food and Beverage$810

Travel and Lodging$585

REFERRAL NETWORK

Where David Chang's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 12 inbound referrers · 25 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Kathryn Hawrylyshyn Anesthesiology · Palo Alto, CA	80	128
Michael Hung Anesthesiology · Palo Alto, CA	52	79
Jon Keller Pathology · Palo Alto, CA	39	120
Peter Sun Anesthesiology · San Jose, CA	36	57
EL CAMINO HOSPITAL	36	78
Edmund Tai Hematology-Oncology · Mountain View, CA	36	121
Alejandro Zaffaroni Ophthalmology · Los Altos, CA	27	56
NPI 1447682380	21	36
Van Tran Anesthesiology · Palo Alto, CA	20	29
GOOD SAMARITAN HOSPITAL, L.P.	13	25
SILVERSTEIN, DAVID	11	19
Andrew Menkes Dermatology · Mountain View, CA	11	19

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
Peninsula Eye Surgery Center Llc Ambulatory Surgical Center · Mountain View, CA	708	1,997
FLORY, TERESA	332	733
Michael Hung Anesthesiology · Palo Alto, CA	124	218
Shirley Liu Anesthesiology · Palo Alto, CA	101	206
DOLAN, WILLIAM	97	183
STANFORD HEALTH CARE	85	253
Unilab Corporation Clinical Laboratory · San Jose, CA	75	238
Van Tran Anesthesiology · Palo Alto, CA	65	108
Kathryn Hawrylyshyn Anesthesiology · Palo Alto, CA	58	71
Thomas Gaffey Anesthesiology · Palo Alto, CA	56	101
Laboratory Corporation Of America Clinical Laboratory · San Diego, CA	51	93
EL CAMINO HOSPITAL	45	97

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events