Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Margaret Ting Ryan, M.D.

Endocrinology, Diabetes & Metabolism Physician in Bryn Mawr, PA · enumerated 2007.

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

National Provider Identifier

1093926560

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Registry record

Entity type Individual (Type 1)

Name Margaret Ting Ryan

Credential M.D.

Sex Female

Practice address Bryn Mawr, PA, 19010

Phone (610) 527-1604

Fax (610) 525-8018

Enumeration date May 25, 2007

Last updated in NPPES Apr 5, 2017

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207RE0101X Endocrinology, Diabetes & Metabolism Physician Allopathic & Osteopathic Physicians · License MD 436772 (PA) Primary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 238155 (NY) Secondary

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
MD 436772	Other	PA	UNRESTRICTED MEDICAL LICENSE
102575753005	Medicaid	PA	-
238155	Other	NY	LICENSE NUMBER

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 Margaret Ryan?

Margaret Ryan is registered in NPPES with the primary taxonomy of Endocrinology, Diabetes & Metabolism 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-04-05.