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SOWMYA ARJA M.D.
NPI 1215390166
Internal Medicine - Allergy & Immunology in San Francisco, CA

Active since March 29, 2016PECOS EnrolledAccepts Medicare Assignment
100/100
CMS Quality Rating
450 SUTTER ST STE 1139, SAN FRANCISCO, CA 94108(415) 362-2614(415) 362-2615 Get Directions Write a Review

NPPES record last updated: January 4, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 4, 2023, Jul 13, 2020, Mar 29, 2016 (3 updates tracked since 2016).

About Sowmya Arja M.d. NPPES

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

SOWMYA ARJA M.D. (NPI 1215390166) is an individual allergy & immunology provider in San Francisco, California, licensed in California (A167950) and active in the NPI registry since March 2016. She is enrolled in Medicare PECOS and is a graduate of University Of California, San Francisco School Of Medicine (2016).

NPPES Registry Identity

NPI1215390166
Entity TypeIndividualFemale
Primary Taxonomy207RA0201X
Provider Legal NameSOWMYA ARJACredential: M.D.
Location Address450 SUTTER ST STE 1139San Francisco, CA 94108-4206
Mailing Address450 Sutter St Rm 933San Francisco, CA 94108-3997 · (415) 362-2614 · Fax (415) 362-2615
Phone(415) 362-2614
Fax(415) 362-2615
Sole ProprietorNo
Medical School CMSUniversity Of California, San Francisco School Of MedicineGraduated 2016
Enumeration DateMarch 29, 2016
Last NPPES UpdateJanuary 4, 20233 updates tracked since enumeration
NPPES CertifiedJanuary 4, 2023
✔ NPI 1215390166 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Allergy & ImmunologyAllopathic & Osteopathic Physicians
Taxonomy Code207RA0201X
License✔ Licensed in CA · A167950
Definition
An internist doctor of osteopathy that specializes in the treatment of allergy and immunologic disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine can obtain a Certificate of Special Qualifications in the field of Allergy & Immunology.
450 SUTTER ST STE 1139, San Francisco, CA 94108
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Sowmya Arja 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 ID6204122245
PECOS Enrollment IDI20230328001944
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

2

Medicare enrollment records show Sowmya Arja reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Permanente Medical Group Inc
1.8 mi
Internal Medicine
2238 GEARY
San Francisco, CA 94116
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1841373800 (415) 833-2200
Regents Of The University Of California - Ucsf
3.4 mi
Multi-Specialty
505 PARNASSUS AVE
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 82 clinicians in this Medicare group
NPI 1265890263 (415) 476-1000

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 94108 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

100/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Improvement Activities40

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

WYNDE LYNN VASTINE CCC-SLP
Speech-Language Pathologist
450 SUTTER ST STE 1139
SAN FRANCISCO, CA 94108
San Francisco County (415) 839-8669

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 Sowmya Arja's NPI number?

The NPI number for Sowmya Arja is 1215390166. It was assigned to this individual provider in the NPPES registry on March 29, 2016.

Where is Sowmya Arja located?

Sowmya Arja practices at 450 Sutter St Ste 1139, San Francisco, CA 94108. The listed phone number is (415) 362-2614.

What is Sowmya Arja's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Allergy & Immunology, with taxonomy code 207RA0201X.

Is Sowmya Arja enrolled in Medicare?

Yes. Sowmya Arja 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.

Which organizations bill Medicare for Sowmya Arja's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sowmya Arja reassigns Medicare benefits to 2 organizations: Permanente Medical Group Inc (San Francisco, CA) and Regents Of The University Of California - Ucsf (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 Sowmya Arja'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 Sowmya Arja was last updated on January 4, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.