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

Mark A Sierra, MD

Individual provider Cardiovascular Disease Physician · NPI 1639381593

Mark A Sierra, MD is a Cardiovascular Disease (Cardiology) in West Branch, Michigan. Qualified in 2002, 24 years ago. Practices with McLaren Bay Region, a 111-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
24
Licensed in
MI
In the registry since
2007
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

2431 S M-30
West Branch, MI 48661-9312
Phone: (989) 343-3264
Fax: (989) 343-3202
Show map & directions

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

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 4301086565 (MI)

Record details

NPI number1639381593
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 4, 2007
Last updated in NPPESApril 25, 2012
Mailing address401 S. Bellenger Hwy, Flint, MI 48532-3638

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2002 (24 years in practice)
Group practice McLaren Bay Region — 111 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Other providers in West Branch