Mark Allen Fernandez, M.D.
Internal Medicine Physician · Peru, IL
Mark Allen Fernandez, M.D. is an internal medicine physician with a practice address in Peru, Illinois, and NPI 1033114939, issued on Jun 16, 2005. Check the license (Illinois 036-089936, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Mark Allen Fernandez
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 036-089936 IL
036089936 IL
Self-reported in NPPES; status is on the state search - Practice location
- 920 West St, Peru, IL 61354
- Phone
- (815) 223-9214
- Enumerated
- Jun 16, 2005
- Record last updated
- Nov 20, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (815) 223-9322
- Medicaid ID
- 036089936 IL
- Entity
- Type 1 · individual
Also registered at 920 West St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Qusai Alitter, M.D.Pulmonary Disease Physician1093169419
- Tracey Antle, C.N.MAdvanced Practice Midwife1598981193
- Shyrlena Bogard, MDGynecology Physician1467615898
- Nora Burch, WHNP-BCObstetrics & Gynecology Nurse Practitioner1104740877
- Thomas Curry, MDSurgery Physician1194706903
- Brian Duttlinger, RPHPharmacist1629113907
Verify Mark Allen Fernandez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036-089936Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
220 Medicare Part D claims for 27 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Sulfasalazine24 claims
- Lisinopril16 claims
- Atorvastatin Calcium14 claims
- Metoprolol Tartrate11 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.
5 internal medicine physician records list a practice address in Peru
They are 5 of the 224 NPPES records with a practice address in Peru, and 7,238 internal medicine physician records in Illinois.
All 5 in Peru → All 7,238 in Illinois → Every provider in Peru →
Other internal medicine physician records in Illinois
- Peter Abadeer, D.O.Bloomington, IL1760469522
- Motaz Abas, MDPeoria, IL1215510201
- Elias Abate, M.D.Chicago, IL1336712199
- Maliha Abbas, D.O.Chicago, IL1174963920
- Zareena Abbas, MDChicago, IL1427078872
- Abu Abbasi, MDChicago, IL1083243877
- Ayesha Abbasi, MDChicago, IL1376216705
- Khalda Abbasi, MDNaperville, IL1487705240
- Elmer Abbo, MDBurr Ridge, IL1710048541
- Paul Abbo, M.D.River Forest, IL1083693378
Common questions
What is Mark Allen Fernandez, M.D.'s NPI number?
Mark Allen Fernandez, M.D.'s National Provider Identifier (NPI) is 1033114939, issued on Jun 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark Allen Fernandez, M.D. located?
The NPPES record lists a practice address at 920 West St, Peru, IL, 61354. Phone: (815) 223-9214. Providers update this record themselves, so call before visiting.
How can I verify Mark Allen Fernandez, M.D.'s license?
NPPES lists Illinois license number 036-089936, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Allen Fernandez, M.D. prescribe under Medicare Part D?
In 2024, Mark Allen Fernandez, M.D. had 220 Medicare Part D claims for 27 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.