1. Home
  2. Directory
  3. California
  4. Rosemead
  5. Specialist
  6. NPI Profile

STEVEN ST MA MD
NPI 1104964303
Specialist in Rosemead, CA

Active since February 01, 2007PECOS Enrolled
9428 VALLEY BLVD STE 201, ROSEMEAD, CA 91770(626) 350-6776(626) 350-3353 Get Directions Write a Review

NPPES record last updated: December 31, 2008. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Steven St Ma Md NPPES

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

STEVEN ST MA MD (NPI 1104964303) is an individual specialist in Rosemead, California, licensed in California (A62421) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1104964303
Entity TypeIndividualMale
Primary Taxonomy174400000X
Provider Legal NameSTEVEN ST MACredential: MD
Location Address9428 VALLEY BLVD STE 201Rosemead, CA 91770-1570
Mailing AddressPo Box 2110Palm Springs, CA 92263-2110 · (626) 350-6776 · Fax (626) 350-3353
Phone(626) 350-6776
Fax(626) 350-3353
Sole ProprietorYes
Enumeration DateFebruary 1, 2007
Last NPPES UpdateDecember 31, 2008
✔ NPI 1104964303 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in CA · A62421
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
9428 VALLEY BLVD STE 201, Rosemead, CA 91770
Open in Google Maps ↗

Other Identifiers 2

Medicare PINW15680ACA
Medicare PINAQ053ZCA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Steven St Ma Md 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 Reassignment

Medicare enrollment records show Steven Ma reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Bellingham Bay Ophthalmology PLLC
1,039 mi
Ophthalmology
3125 HOWE PL STE 101
Bellingham, WA 98226
  • Reassigned Medicare billing, Washington enrollment
  • 4 clinicians in this Medicare group
NPI 1588649008 (360) 647-7750

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

Other Providers at the Same Location NPPES 3

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

ELSON LAI, MD, A PROFESSIONAL CORPORATION
Clinic/Center (Ophthalmologic Surgery)
9428 VALLEY BLVD STE 201
ROSEMEAD, CA 91770
Los Angeles County (626) 353-0399
ELSON LAI MD
Ophthalmology
9428 VALLEY BLVD STE 201
ROSEMEAD, CA 91770
Los Angeles County (626) 353-0399
ROSEMEAD SURGICAL SERVICES LLC
Clinic/Center (Ambulatory Surgical)
9428 VALLEY BLVD STE 201
ROSEMEAD, CA 91770
Los Angeles County (626) 921-2889

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 Steven Ma's NPI number?

The NPI number for Steven Ma is 1104964303. It was assigned to this individual provider in the NPPES registry on February 1, 2007.

Where is Steven Ma located?

Steven Ma practices at 9428 Valley Blvd Ste 201, Rosemead, CA 91770. The listed phone number is (626) 350-6776.

What is Steven Ma's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Steven Ma enrolled in Medicare?

Yes. Steven Ma is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Steven Ma's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Steven Ma reassigns Medicare benefits to Bellingham Bay Ophthalmology PLLC (Bellingham, WA). The 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 Steven Ma'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 Steven Ma was last updated on December 31, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.