DR. MARTHA JOHNSON M.D.
NPI 1669649885
Family Medicine in Baltimore, MD
About Dr. Martha Johnson M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARTHA JOHNSON M.D. (NPI 1669649885) is an individual family medicine provider in Baltimore, Maryland, licensed in Maryland (D0074552) and active in the NPI registry since May 2008. She is enrolled in Medicare PECOS, is affiliated with University Of Maryland Medical Center, and is a graduate of University Of Chicago, Pritzker School Of Medicine (2008).
NPPES Registry Identity
Specialties & Licenses 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. Martha Johnson 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
2Medicare enrollment records show Martha Johnson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Baltimore, MD 21239
- Reassigned Medicare billing, Maryland enrollment
- 2,602 clinicians in this Medicare group
Baltimore, MD 21201
- Reassigned Medicare billing, Maryland enrollment
- 85 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 10
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Maryland Medical Center
Acute Care Hospitals · Baltimore, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21237 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
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.
BALTIMORE, MD 21237
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 Martha Johnson's NPI number?
The NPI number for Martha Johnson is 1669649885. It was assigned to this individual provider in the NPPES registry on May 15, 2008.
Where is Martha Johnson located?
Martha Johnson practices at 9101 Franklin Square Dr, Baltimore, MD 21237. The listed phone number is (443) 777-2000.
What is Martha Johnson's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Martha Johnson enrolled in Medicare?
Yes. Martha Johnson 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 Martha Johnson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Martha Johnson reassigns Medicare benefits to 2 organizations: Medstar Medical Group II LLC (Baltimore, MD) and University Of Maryland Family Medicine Associates, P.A. (Baltimore, MD). 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 Martha Johnson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Martha Johnson affiliated with any hospitals?
According to CMS data, Martha Johnson is affiliated with University Of Maryland Medical Center.
When was this NPI record last updated?
The NPPES record for Martha Johnson was last updated on August 29, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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. Martha Johnson, M.D. · NPI 1669649885
Family Medicine physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since May 15, 2008.
## Identity
- **NPI:** 1669649885 (Entity type: Individual)
- **Enumerated:** May 15, 2008
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** D0074552 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 9101 FRANKLIN SQUARE DR, Baltimore, MD 21237-3936
- **Phone:** (443) 777-2000
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Medstar Medical Group II LLC (NPI 1184046187, Baltimore, MD); University Of Maryland Family Medicine Associates, P.A. (NPI 1053424994, Baltimore, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Chicago, Pritzker School Of Medicine, class of 2008
## Record status
- **NPPES last updated:** August 29, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1669649885) · Data from the CMS NPPES public registry.