Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ross Greenstein, PA
Physician Assistant in Jackson, MI · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1598772071
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Registry record
Entity type Individual (Type 1)
Name Ross Greenstein
Credential PA
Sex Male
Practice address 1100 E Michigan Ave Ste 201, Jackson, MI, 49201
Phone (517) 817-7609
Enumeration date Aug 1, 2006
Last updated in NPPES Jun 8, 2026
Taxonomy & licenses
363AS0400X Surgical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 085002270 (IL) Secondary
363AS0400X Surgical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 5601005214 (MI) Secondary
363AS0400X Surgical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 10003974A (IN) Secondary
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 5601005214 (MI) Primary
PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program.
About the PA 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.
Frequently asked questions
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.
What specialty is Ross Greenstein?
Ross Greenstein is registered in NPPES with the primary taxonomy of Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Ronda Albrecht Acute Care Nurse Practitioner · Jackson, MI NPI 1235377516 Kenneth Hawkins Family Nurse Practitioner · Jackson, MI NPI 1215316831 Christopher Newell Physician Assistant · Jackson, MI NPI 1063871838 Hossein Amirjamshidi Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Jackson, MI NPI 1932561941 Eric Marshall Physician Assistant · Jackson, MI NPI 1770030611
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-08.