Dr. Mark D. Jacobs, MD
Dr. Mark D. Jacobs is a Internal Medicine Physician provider (Internal Medicine) practicing in Needham, MA, registered in the NPPES registry with NPI 1124013883 since 2005. The credential MD stands for Doctor of Medicine. Practices at Atrius Health, Inc. (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1124013883 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Mark D. Jacobs |
| Credential | MD |
| Sex | Male |
| Practice address | 100 2ND AVE, Needham, MA, 02494 |
| Phone | 7817264800 |
| Enumeration date | 2005-09-19 |
| Last updated in NPPES | 2016-12-19 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | Primary | 242029 | MA |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| NPI | Other | MA | 1124013883 |
| 9239986 | Other | MA | CIGNA |
| 9971374 | Other | MA | AETNA |
| 242029 | Other | MA | MEDICAL LICENSE |
| 404478 | Other | MA | TUFTS HEALTH PLAN |
| AA173484 | Other | MA | HPHC |
Copy-ready billing details
Provider: Mark Jacobs, MD NPI: 1124013883 Taxonomy: 207R00000X (Internal Medicine Physician) Address: 100 2ND AVE, Needham, MA, 02494
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1104041151 | Judith Hershey | Individual | Gerontology Nurse Practitioner | Needham, MA |
| 1316108137 | Claire Franks | Individual | Gerontology Clinical Nurse Specialist | Needham, MA |
| 1053862045 | Atrius Health, Inc. | Organization | Internal Medicine Physician | Needham, MA |
| 1598649998 | Ashley Smith | Individual | Ambulatory Care Pharmacist | Needham, MA |
Verify this record
Cross-check NPI 1124013883 against the authoritative CMS record: view Dr. Mark D. Jacobs on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2016-12-19.