Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ayan Chatterjee, M.D.

Glaucoma Specialist (Ophthalmology) Physician in King of Prussia, PA · enumerated 2014.

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

National Provider Identifier

1265845804

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Registry record

Entity type Individual (Type 1)

Name Dr. Ayan Chatterjee

Credential M.D.

Sex Male

Practice address 200 Mall Blvd, King of Prussia, PA, 19406

Phone (866) 407-1852

Enumeration date Jun 10, 2014

Last updated in NPPES Jan 27, 2019

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 259852 (MA) Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 2018-00306 (NC) Secondary

207WX0009X Glaucoma Specialist (Ophthalmology) Physician Allopathic & Osteopathic Physicians · License 2018-00306 (NC) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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.

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Frequently asked questions

What is the NPI number for Ayan Chatterjee?

The National Provider Identifier (NPI) for Ayan Chatterjee is 1265845804, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ayan Chatterjee practice?

The practice location on file with NPPES is in King of Prussia, PA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-01-27.