Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marcus Sidney Shaker, M.D.

Allergy Physician in Lebanon, NH · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1679686836

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Registry record

Entity type Individual (Type 1)

Name Marcus Sidney Shaker

Credential M.D.

Sex Male

Practice address 1 Medical Center Dr, Lebanon, NH, 03756

Phone (603) 653-9885

Fax (603) 640-1228

Enumeration date Aug 15, 2006

Last updated in NPPES Jan 9, 2026

Taxonomy & licenses

207KA0200X Allergy Physician Allopathic & Osteopathic Physicians · License 12538 (NH) Primary

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
30204685	Medicaid	NH	-
1010922	Medicaid	VT	-

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 → Validate an NPI →

Frequently asked questions

What specialty is Marcus Shaker?

Marcus Shaker is registered in NPPES with the primary taxonomy of Allergy Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

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Brian Birner Certified Registered Nurse Anesthetist · Lebanon, NH NPI 1215930052 Joerg Rathmann Hematology & Oncology Physician · Lebanon, NH NPI 1568465532 Jeffrey Low Pharmacist · Lebanon, NH NPI 1265437602 Stephen Holderman Adult Health Nurse Practitioner · Lebanon, NH NPI 1255339636 Stephen Lordon Pain Medicine (Anesthesiology) Physician · Lebanon, NH NPI 1275532020 Michael Pearl Gynecologic Oncology Physician · Lebanon, NH NPI 1043219512 Carlyn Herz Family Nurse Practitioner · Lebanon, NH NPI 1780684530 Richard Smith Otolaryngology Physician · Lebanon, NH NPI 1689674426

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-09.