Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Nehemiah T Tan, MD

Individual provider Rheumatology Physician · NPI 1578520995

Nehemiah T Tan, MD is a Rheumatology in Mattoon, Illinois. Qualified in 1989, 37 years ago. Practices with Sarah Bush Lincoln Health Center, a 410-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
37
Licensed in
IL
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

200 Richmond Ave E Ste 3
Mattoon, IL 61938-4652
Phone: (217) 238-7000
Fax: (217) 234-2060
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Rheumatology Physician (primary) Taxonomy 207RR0500X · Licence 036085107 (IL)

Record details

NPI number1578520995
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 28, 2006
Last updated in NPPESApril 6, 2026
Certification dateApril 6, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyRHEUMATOLOGY
Medical schoolOTHER
Graduated 1989 (37 years in practice)
Group practice Sarah Bush Lincoln Health Center — 410 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount