DR. JOSEPH MARTIN LITWAK MD
NPI 1396792958
Hospitalist in Oak Bluffs, MA
About Dr. Joseph Martin Litwak Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOSEPH MARTIN LITWAK MD (NPI 1396792958) is an individual hospitalist provider in Oak Bluffs, Massachusetts, licensed in New Hampshire (14515) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Monadnock Community Hospital, and is a graduate of Other (1992).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Accepted Insurance
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. Joseph Martin Litwak Md 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
9Medicare enrollment records show Joseph Litwak reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oak Bluffs, MA 02557
- Reassigned Medicare billing, Massachusetts enrollment
- 251 clinicians in this Medicare group
Nantucket, MA 02554
- Reassigned Medicare billing, Massachusetts enrollment
- 206 clinicians in this Medicare group
Gardner, MA 01440
- Reassigned Medicare billing, Massachusetts enrollment
- 344 clinicians in this Medicare group
Athol, MA 01331
- Reassigned Medicare billing, Massachusetts enrollment
- 324 clinicians in this Medicare group
Peterborough, NH 03458
- Reassigned Medicare billing, New Hampshire enrollment
- 68 clinicians in this Medicare group
Littleton, NH 03561
- Reassigned Medicare billing, New Hampshire enrollment
- Also billed through NPI 1265536718 (New Hampshire)
- 126 clinicians in this Medicare group
Berlin, NH 03570
- Reassigned Medicare billing, New Hampshire enrollment
- Also billed through NPI 1679526644 (New Hampshire)
- 128 clinicians in this Medicare group
Colebrook, NH 03576
- Reassigned Medicare billing, New Hampshire enrollment
- 63 clinicians in this Medicare group
Johnstown, CO 80534
- Reassigned Medicare billing, Massachusetts enrollment
- 53 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 2
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.
Monadnock Community Hospital
Critical Access Hospitals · Peterborough, NHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02557 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.
OAK BLUFFS, MA 02557
OAK BLUFFS, MA 02557
OAK BLUFFS, MA 02557
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 Joseph Litwak's NPI number?
The NPI number for Joseph Litwak is 1396792958. It was assigned to this individual provider in the NPPES registry on May 28, 2006.
Where is Joseph Litwak located?
Joseph Litwak practices at 1 Hospital Rd, Oak Bluffs, MA 02557. The listed phone number is (603) 502-4144.
What is Joseph Litwak's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Joseph Litwak enrolled in Medicare?
Yes. Joseph Litwak 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 Joseph Litwak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Joseph Litwak reassigns Medicare benefits to 9 organizations: Martha's Vineyard Hospital, Inc. (Oak Bluffs, MA), Nantucket Cottage Hospital (Nantucket, MA), Henry Heywood Memorial Hospital (Gardner, MA), Athol Memorial Hospital Incorporated (Athol, MA), Monadnock Community Hospital (Peterborough, NH) and 4 more organizations, listed in the Medicare section above. 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 Joseph Litwak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Joseph Litwak accept?
Health plans from Taro Health list Joseph Litwak as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Joseph Litwak affiliated with any hospitals?
According to CMS data, Joseph Litwak is affiliated with Monadnock Community Hospital.
When was this NPI record last updated?
The NPPES record for Joseph Litwak was last updated on November 23, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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. Joseph Martin Litwak, MD · NPI 1396792958
Hospitalist physician in Oak Bluffs, Massachusetts. Individual provider, active in the CMS NPPES registry since May 28, 2006.
## Identity
- **NPI:** 1396792958 (Entity type: Individual)
- **Enumerated:** May 28, 2006
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 14515 (New Hampshire)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 HOSPITAL RD, Oak Bluffs, MA 02557-1406
- **Phone:** (603) 502-4144 · **Fax:** (413) 200-3251
## 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:** 9 organizations under Medicare reassignment (form CMS-855R): Martha's Vineyard Hospital, Inc. (NPI 1194866210, Oak Bluffs, MA); Nantucket Cottage Hospital (NPI 1447214622, Nantucket, MA); Henry Heywood Memorial Hospital (NPI 1205448701, Gardner, MA); Athol Memorial Hospital Incorporated (NPI 1336120047, Athol, MA); Monadnock Community Hospital (NPI 1063364768, Peterborough, NH); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1992
## Record status
- **NPPES last updated:** November 23, 2020
- **Other identifiers:** Medicaid 30208808 (NH); Medicaid 891118N (NC)
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Source: [NPI Profile](https://npiprofile.com/npi/1396792958) · Data from the CMS NPPES public registry.