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DR. REGINA-CELESTE SHAHNAZ AHMAD M.D., PHD
NPI 1861629321
Dermatology in San Francisco, CA

Active since June 11, 2009PECOS Enrolled
1701 DIVISADERO ST, SAN FRANCISCO, CA 94115(415) 353-7800(415) 353-9654 Get Directions Write a Review

NPPES record last updated: January 12, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Regina-celeste Shahnaz Ahmad M.d., Phd NPPES

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

DR. REGINA-CELESTE SHAHNAZ AHMAD M.D., PHD (NPI 1861629321) is an individual dermatology provider in San Francisco, California, licensed in California (A113304) and active in the NPI registry since June 2009. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1861629321
Entity TypeIndividualFemale
Primary Taxonomy207N00000X
Provider Legal NameDR. REGINA-CELESTE SHAHNAZ AHMADCredential: M.D., PHD
Location Address1701 DIVISADERO STSan Francisco, CA 94115-3011
Mailing Address1701 Divisadero StSan Francisco, CA 94115-3011 · (415) 353-7800 · Fax (415) 353-9654
Phone(415) 353-7800
Fax(415) 353-9654
Sole ProprietorNo
Enumeration DateJune 11, 2009
Last NPPES UpdateJanuary 12, 2022
NPPES CertifiedJanuary 12, 2022
✔ NPI 1861629321 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians
Taxonomy Code207N00000X
License✔ Licensed in CA · A113304
Definition
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
1701 DIVISADERO ST, San Francisco, CA 94115
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Regina-celeste Shahnaz Ahmad M.d., Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignments

3

Medicare enrollment records show Regina-celeste Ahmad reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

University Of California San Francisco
1.8 mi
Surgery
400 PARNASSUS AVE, MCB 300
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 5,645 clinicians in this Medicare group
NPI 1346329380 (415) 353-2161
Ucsf Medical Group Business Services
1.8 mi
Internal Medicine
400 PARNASSUS AVE
San Francisco, CA 94122
  • Reassigned Medicare billing, California enrollment
  • 5,544 clinicians in this Medicare group
NPI 1477624104 (415) 353-2808
University Of California Sfgh Medical Group
2.8 mi
Dermatology
1001 POTRERO AVENUE, BLDG 90 WARD 92
San Francisco, CA 94110
  • Reassigned Medicare billing, California enrollment
  • 34 clinicians in this Medicare group
NPI 1164497285 (415) 206-8680

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94115 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
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
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.

DR. DANIEL BUTLER M.D.
Internal Medicine
1701 DIVISADERO ST
SAN FRANCISCO, CA 94115
San Francisco County (415) 353-7800
TAYLOR ALYSE JAMERSON
Student in an Organized Health Care Education/Training Program
1701 DIVISADERO ST
SAN FRANCISCO, CA 94115
San Francisco County (415) 353-7800
ANNELISE ALEXANDRA COLVIN MD
Dermatology
1701 DIVISADERO ST
SAN FRANCISCO, CA 94115
San Francisco County (415) 353-7800
DR. CYNTHIA LEA CHEN M.D.
Dermatology
1701 DIVISADERO ST, THIRD FLOOR
SAN FRANCISCO, CA 94115
San Francisco County (415) 353-7800
RYAN Y. ARAKAKI MD
Dermatology
1701 DIVISADERO ST
SAN FRANCISCO, CA 94115
San Francisco County (415) 353-7800
DR. MEREDITH HELLER M.D.
Internal Medicine
1701 DIVISADERO ST
SAN FRANCISCO, CA 94115
San Francisco County (415) 353-7300
DR. TIFFANY CRAWFORD SCHARSCHMIDT M.D.
Dermatology
1701 DIVISADERO ST, ROOM 340
SAN FRANCISCO, CA 94115
San Francisco County (415) 353-7800
LAURA B PINCUS
Dermatology
1701 DIVISADERO ST
SAN FRANCISCO, CA 94115
San Francisco County (415) 353-7800

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 Regina-celeste Ahmad's NPI number?

The NPI number for Regina-celeste Ahmad is 1861629321. It was assigned to this individual provider in the NPPES registry on June 11, 2009.

Where is Regina-celeste Ahmad located?

Regina-celeste Ahmad practices at 1701 Divisadero St, San Francisco, CA 94115. The listed phone number is (415) 353-7800.

What is Regina-celeste Ahmad's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

Is Regina-celeste Ahmad enrolled in Medicare?

Yes. Regina-celeste Ahmad is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Regina-celeste Ahmad's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Regina-celeste Ahmad reassigns Medicare benefits to 3 organizations: University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA) and University Of California Sfgh Medical Group (San Francisco, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Regina-celeste Ahmad's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Regina-celeste Ahmad was last updated on January 12, 2022. 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.