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DR. GRACE GYUNGAH AHN M.D.
NPI 1194923813
Emergency Medicine in San Francisco, CA

Active since July 03, 2007PECOS EnrolledAccepts Medicare Assignment
1001 POTRERO AVE STE 1E21, SAN FRANCISCO, CA 94110(415) 206-8111 Get Directions Write a Review

NPPES record last updated: December 13, 2021. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Dec 13, 2021, Jul 27, 2017 (2 updates tracked since 2017).

About Dr. Grace Gyungah Ahn M.d. NPPES

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

DR. GRACE GYUNGAH AHN M.D. (NPI 1194923813) is an individual emergency medicine provider in San Francisco, California, licensed in California (A100922) and active in the NPI registry since July 2007. She is enrolled in Medicare PECOS and is a graduate of University Of Michigan Medical School (2006).

NPPES Registry Identity

NPI1194923813
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameDR. GRACE GYUNGAH AHNCredential: M.D.
Location Address1001 POTRERO AVE STE 1E21San Francisco, CA 94110-3518
Mailing Address1425 S Main StWalnut Creek, CA 94596-5318
Phone(415) 206-8111
Sole ProprietorNo
Medical School CMSUniversity Of Michigan Medical SchoolGraduated 2006
Enumeration DateJuly 3, 2007
Last NPPES UpdateDecember 13, 20212 updates tracked since enumeration
✔ NPI 1194923813 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in CA · A100922
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
1001 POTRERO AVE STE 1E21, San Francisco, CA 94110
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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. Grace Gyungah Ahn M.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 ID6305999384
PECOS Enrollment IDI20090810000194
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 94110 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
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
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.

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 Grace Ahn's NPI number?

The NPI number for Grace Ahn is 1194923813. It was assigned to this individual provider in the NPPES registry on July 3, 2007.

Where is Grace Ahn located?

Grace Ahn practices at 1001 Potrero Ave Ste 1e21, San Francisco, CA 94110. The listed phone number is (415) 206-8111.

What is Grace Ahn's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Grace Ahn enrolled in Medicare?

Yes. Grace 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 Grace Ahn was last updated on December 13, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.