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MICHAEL S. AHN MD
NPI 1225115173
Internal Medicine - Gastroenterology in Santa Clara, CA

Active since October 31, 2006PECOS EnrolledAccepts Medicare Assignment
710 LAWRENCE EXPY, SANTA CLARA, CA 95051(408) 851-1000 Get Directions Write a Review

NPPES record last updated: December 6, 2021. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Michael S. Ahn Md NPPES

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

MICHAEL S. AHN MD (NPI 1225115173) is an individual gastroenterology provider in Santa Clara, California, licensed in California (G80248) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Chicago, Pritzker School Of Medicine (1993).

NPPES Registry Identity

NPI1225115173
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameMICHAEL S. AHNCredential: MD
Location Address710 LAWRENCE EXPYSanta Clara, CA 95051-5173
Mailing Address1800 Harrison St Fl 7Oakland, CA 94612-3466 · (510) 625-6262
Phone(408) 851-1000
Sole ProprietorNo
Medical School CMSUniversity Of Chicago, Pritzker School Of MedicineGraduated 1993
Enumeration DateOctober 31, 2006
Last NPPES UpdateDecember 6, 2021
✔ NPI 1225115173 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in CA · G80248
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
710 LAWRENCE EXPY, Santa Clara, CA 95051
Open in Google Maps ↗

Other Identifiers 1

Medicaid00G802480CA

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

Michael S. Ahn Md 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 ID7315128865
PECOS Enrollment IDI20110216001125
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95051 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
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
Established Patient
$121.77 typical visit price
range $23.96 – $169.60
Typical copayment $30.44 (range $5.99 – $42.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

MRS. SHARLENE JUNIO MADANES N.P.
Nurse Practitioner (Family)
710 LAWRENCE EXPY
SANTA CLARA, CA 95051
Santa Clara County (408) 851-3829
ELLEN CHINCHILLI MD
Student in an Organized Health Care Education/Training Program
710 LAWRENCE EXPY
SANTA CLARA, CA 95051
Santa Clara County (408) 851-3817
SWARNA L KONERU RD
Dietitian, Registered
710 LAWRENCE EXPY
SANTA CLARA, CA 95051
Santa Clara County (408) 851-1000
MRS. BRIDGET M. BOUYSSOUNOUSE P.T.
Physical Therapist
710 LAWRENCE EXPY, DEPT. #174
SANTA CLARA, CA 95051
Santa Clara County (408) 851-1466
FLAIR D. GOLDMAN DPM
Podiatrist
710 LAWRENCE EXPY
SANTA CLARA, CA 95051
Santa Clara County (408) 236-6400
MR. KRISNA P CHAI M.D.
Internal Medicine (Gastroenterology)
710 LAWRENCE EXPY
SANTA CLARA, CA 95051
Santa Clara County (408) 851-1000
KARISSA TAAN MPT
Physical Therapist
710 LAWRENCE EXPY
SANTA CLARA, CA 95051
Santa Clara County (408) 851-1492
ANDREA B. HUTCHINSON MD
Obstetrics & Gynecology
710 LAWRENCE EXPY
SANTA CLARA, CA 95051
Santa Clara County (408) 851-1000

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 Michael Ahn's NPI number?

The NPI number for Michael Ahn is 1225115173. It was assigned to this individual provider in the NPPES registry on October 31, 2006.

Where is Michael Ahn located?

Michael Ahn practices at 710 Lawrence Expy, Santa Clara, CA 95051. The listed phone number is (408) 851-1000.

What is Michael Ahn's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Michael Ahn enrolled in Medicare?

Yes. Michael Ahn 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 Michael Ahn was last updated on December 6, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.