Mark A. Sierra, MD
Cardiovascular Disease Physician · West Branch, MI
Mark A. Sierra, MD is a cardiovascular disease physician with a practice address in West Branch, Michigan, and NPI 1639381593, issued on May 4, 2007. Check the license (Michigan 4301086565, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Mark A. Sierra
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- 4301086565 MI
Self-reported in NPPES; status is on the state search - Practice location
- 2431 S. M-30, West Branch, MI 48661
- Phone
- (989) 343-3264
- Enumerated
- May 4, 2007
- Record last updated
- Apr 25, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (989) 343-3202
- Medicare enrollment
- Enrolled (PECOS I20080627000038); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 860 in Michigan → Look up another NPI →
Also registered at 2431 S. M-30
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Thomas Tomczak, MDEmergency Medicine Physician1780607853
Verify Mark A. Sierra in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301086565Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% more Medicare Part D claims than the average cardiovascular disease physician in 2024
5,609 Medicare Part D claims for 759 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Metoprolol Succinate594 claims
- Isosorbide Mononitrate Er393 claims
- Atorvastatin Calcium374 claims
- Eliquis357 claims
- Furosemide326 claims
- Lisinopril313 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $126.67
5 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 16,686 providers of this specialty with any payment received $3,819.56 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
3 hospitals and group practices
- Mclaren Central MichiganWest Branch, MI · Acute Care Hospitals3 of 5 stars
- Mclaren Bay RegionBay City, MI · Acute Care Hospitals1 of 5 stars
- Mclaren Medical GroupHale, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Mark A. Sierra among 860 cardiovascular disease physician records in Michigan
Mark A. Sierra, MD is one of 860 cardiovascular disease physician records with a practice address in Michigan. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 56% of them.
- NPI issued2007 · 56% of these records are older, 34% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2002 · median 1999 among the 606 with a school on file
- Record last updated2012 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Michigan
There are 860 cardiovascular disease physician records in Michigan.
All 860 in Michigan → Every provider in West Branch → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Aliya Browne, DOWest Branch, MI 486611154361400
- Marshall Spencer, M.D.Midland, MI 486701609921048
- Samer Ali-Hasan, M.D.Midland, MI 486401699869503
- Waleed Doghmi, M.D.Midland, MI 486401023010204
- Robert Genovese, MDMidland, MI 486401427038900
- Jeffrey Martindale, D.O.Midland, MI 486401013158906
- Stephen Mattichak, MDMidland, MI 486401013930189
- Susan Sallach, MDMidland, MI 486401659338630
Common questions
What is Mark A. Sierra, MD's NPI number?
Mark A. Sierra, MD's National Provider Identifier (NPI) is 1639381593, issued on May 4, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Sierra, MD located?
The NPPES record lists a practice address at 2431 S. M-30, West Branch, MI, 48661. Phone: (989) 343-3264. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Sierra, MD's license?
NPPES lists Michigan license number 4301086565, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark A. Sierra, MD prescribe under Medicare Part D?
In 2024, Mark A. Sierra, MD had 5,609 Medicare Part D claims for 759 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.