Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mitchell S. Rein, M.D.

Reproductive Endocrinology Physician in Danvers, MA · enumerated 2006 · practices at Catherine Hertl, M.D., P.C..

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

National Provider Identifier

1306810429

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Registry record

Entity type Individual (Type 1)

Name Dr. Mitchell S. Rein

Credential M.D.

Sex Male

Practice address 1 Hutchinson Dr, Nsmc-Women'S Center, Danvers, MA, 01923

Phone (978) 739-6920

Enumeration date Feb 15, 2006

Last updated in NPPES Jul 17, 2007

Taxonomy & licenses

207VE0102X Reproductive Endocrinology Physician Allopathic & Osteopathic Physicians · License 56895 (MA) Primary

207VG0400X Gynecology Physician Allopathic & Osteopathic Physicians · License 56895 (MI) 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
0000178	Other	MA	MASSHEALTH NHP
3020631	Medicaid	MA	-
5237	Other	MA	HPHC
B20457501	Other	MA	CIGNA
H06371	Other	MA	BCBS
REIN-731205	Other	MA	TUFTS HEALTH PLAN
865122	Other	MA	AETNA/US

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

Where does Mitchell Rein practice?

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

What is the NPI number for Mitchell Rein?

The National Provider Identifier (NPI) for Mitchell Rein is 1306810429, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-17.