DR. MARTHA J CHALMERS M.D.
NPI 1508866179
Family Medicine in Halethorpe, MD
About Dr. Martha J Chalmers M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARTHA J CHALMERS M.D. (NPI 1508866179) is an individual family medicine provider in Halethorpe, Maryland, licensed in Maryland (D00059591) and active in the NPI registry since July 2005. She is enrolled in Medicare PECOS and is a graduate of George Washington University School Of Medicine (1998).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
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 J Chalmers 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 Reassignment
Medicare enrollment records show Martha Chalmers reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Halethorpe, MD 21227
- Reassigned Medicare billing, Maryland and District of Columbia enrollments
- Also billed through NPI 1417294984 (Maryland), NPI 1952461816 (District of Columbia), NPI 1366781700 (District of Columbia)
- 701 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21227 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
HALETHORPE, MD 21227
HALETHORPE, MD 21227
HALETHORPE, MD 21227
HALETHORPE, MD 21227
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 Chalmers's NPI number?
The NPI number for Martha Chalmers is 1508866179. It was assigned to this individual provider in the NPPES registry on July 26, 2005. The provider is also known as Martha J Williams.
Where is Martha Chalmers located?
Martha Chalmers practices at 1701 Twin Springs Rd, Halethorpe, MD 21227. The listed phone number is (410) 737-5000.
What is Martha Chalmers's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Martha Chalmers enrolled in Medicare?
Yes. Martha Chalmers 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 organization bills Medicare for Martha Chalmers's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Martha Chalmers reassigns Medicare benefits to Kaiser Foundation Health Plan Of The Mid Atlantic States, Inc (Halethorpe, MD). 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 Martha Chalmers'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 Martha Chalmers was last updated on September 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 30 days 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 J Chalmers, M.D. · NPI 1508866179
Family Medicine physician in Halethorpe, Maryland. Individual provider, active in the CMS NPPES registry since July 26, 2005.
## Identity
- **NPI:** 1508866179 (Entity type: Individual)
- **Enumerated:** July 26, 2005
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** D00059591 (Maryland)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1701 TWIN SPRINGS RD, Halethorpe, MD 21227-3553
- **Phone:** (410) 737-5000
## 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:** Kaiser Foundation Health Plan Of The Mid Atlantic States, Inc (NPI 1942546486, Halethorpe, MD), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** George Washington University School Of Medicine, class of 1998
## Record status
- **NPPES last updated:** September 20, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1508866179) · Data from the CMS NPPES public registry.