Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Erich B Groos Jr., M.D.

Ophthalmology Physician in Nashville, TN · enumerated 2005.

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

National Provider Identifier

1720084601

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Registry record

Entity type Individual (Type 1)

Name Dr. Erich B Groos Jr.

Credential M.D.

Sex Male

Practice address 2400 Patterson St, Suite 201, Nashville, TN, 37203

Phone (615) 320-7200

Fax (615) 320-7203

Enumeration date Jun 24, 2005

Last updated in NPPES May 19, 2020

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 23890 (TN) Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License MD23890 (TN) 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
00001364	Other	TN	NHC HEALTH BENEFITS PLAN
3717165	Medicaid	TN	-
4243673	Other	TN	AETNA
180019311	Other	TN	RAIL ROAD MEDICARE
2616397006	Other	TN	CIGNA
F01637	Other	TN	HEALTHSPRING
3126357	Other	TN	BCBS
3126357	Other	TN	CENTRAL STATES
621745543	Other	TN	HUMANA
621745543000	Other	TN	PRUDENTIAL
OP34694	Other	TN	UNITED HEALTHCARE
F01637	Other	TN	STERLING CLAIMS
3126357	Other	TN	TENNCARE SELECT

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

Is NPI 1720084601 active?

Yes, as of the latest NPPES snapshot, NPI 1720084601 is active (record last updated 2020-05-19).

How do I verify Erich Groos's NPI record?

Cross-check NPI 1720084601 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-05-19.