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

Mark T. Fahlen, MD, Inc a Professional Medical Corporation

Organization Nephrology Physician · NPI 1659537264

Mark T. Fahlen, MD, Inc a Professional Medical Corporation is a Nephrology Physician in Modesto, California. Licensed in California. Registered with an NPI since 2008.

Licensed in
CA
In the registry since
2008
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

1400 Florida Ave Ste 109
Modesto, CA 95350-4422
Phone: (209) 544-2910
Fax: (209) 544-2253
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence A81212 (CA)

Record details

NPI number1659537264
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mark Fahlen — President · (209) 544-2910
NPI enumeratedAugust 3, 2008
Last updated in NPPESAugust 2, 2011
Mailing address1400 Florida Ave, Suite 109, Modesto, CA 95350-4422

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