Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Sonia Ananthakrishnan, M.D.

Endocrinology, Diabetes & Metabolism Physician in Boston, MA · enumerated 2007.

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

National Provider Identifier

1912026543

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Registry record

Entity type Individual (Type 1)

Name Dr. Sonia Ananthakrishnan

Credential M.D.

Sex Female

Practice address 732 Harrison Ave, Fl 2, Preston Bldg, Boston, MA, 02118

Phone (617) 638-7470

Fax (617) 638-7449

Enumeration date Mar 28, 2007

Last updated in NPPES Dec 19, 2023

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 221803 (MA) Secondary

207RE0101X Endocrinology, Diabetes & Metabolism Physician Allopathic & Osteopathic Physicians · License 221803 (MA) 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
3114995	Medicaid	NH	-
110075568A	Medicaid	MA	-

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

Where does Sonia Ananthakrishnan practice?

The practice location on file with NPPES is in Boston, MA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Sonia Ananthakrishnan?

The National Provider Identifier (NPI) for Sonia Ananthakrishnan is 1912026543, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-12-19.