DR. JANET M MA M.D.
NPI 1164698098
Internal Medicine in Santa Monica, CA
About Dr. Janet M Ma M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JANET M MA M.D. (NPI 1164698098) is an individual internal medicine provider in Santa Monica, California, licensed in California (A108822) and active in the NPI registry since April 2008. She is enrolled in Medicare PECOS and is a graduate of Other (2008).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 2
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
Dr. Janet M Ma 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.
Medicare Billing Reassignments
3Medicare enrollment records show Janet Ma reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Santa Monica, CA 90405
- Reassigned Medicare billing, California enrollment
- 147 clinicians in this Medicare group
Los Angeles, CA 90095
- Reassigned Medicare billing, California enrollment
- 323 clinicians in this Medicare group
Los Angeles, CA 90095
- Reassigned Medicare billing, California enrollment
- 1,766 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90404 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
SANTA MONICA, CA 90404
SANTA MONICA, CA 90404
SANTA MONICA, CA 90404
SANTA MONICA, CA 90404
SANTA MONICA, CA 90404
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 Janet Ma's NPI number?
The NPI number for Janet Ma is 1164698098. It was assigned to this individual provider in the NPPES registry on April 30, 2008.
Where is Janet Ma located?
Janet Ma practices at 1245 16th St Suite 125, Santa Monica, CA 90404. The listed phone number is (310) 315-8900.
What is Janet Ma's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Janet Ma enrolled in Medicare?
Yes. Janet Ma 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 Janet Ma's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Janet Ma reassigns Medicare benefits to 3 organizations: Venice Family Clinic (Santa Monica, CA), Uc Regents (Los Angeles, CA) and The Regents Of The University Of California (Los Angeles, 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 Janet 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 Janet Ma was last updated on February 3, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Dr. Janet M Ma, M.D. · NPI 1164698098
Internal Medicine physician in Santa Monica, California. Individual provider, active in the CMS NPPES registry since April 30, 2008.
## Identity
- **NPI:** 1164698098 (Entity type: Individual)
- **Enumerated:** April 30, 2008
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A108822 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1245 16TH ST, SUITE 125, Santa Monica, CA 90404-1235
- **Phone:** (310) 315-8900 · **Fax:** (310) 315-8902
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Venice Family Clinic (NPI 1558397067, Santa Monica, CA); Uc Regents (NPI 1982667663, Los Angeles, CA); The Regents Of The University Of California (NPI 1235107566, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2008
## Record status
- **NPPES last updated:** February 3, 2014
- **Other identifiers:** Medicare PIN GK819Z (CA); Medicaid 1164698098 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1164698098) · Data from the CMS NPPES public registry.