Nicholas L. Hartog, M.D.
Allergy & Immunology Physician · Grand Rapids, MI
Nicholas L. Hartog, M.D. is an allergy & immunology physician with a practice address in Grand Rapids, Michigan, and NPI 1669766325, issued on May 30, 2011. Check the license (Michigan 4301108955, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Nicholas L. Hartog
- Credential
- M.D.
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License numbers
- 4301108955 MI
R-9168 IA
2014010402 MO
Self-reported in NPPES; status is on the state search - Practice location
- 3271 Clear Vista CT NE, Grand Rapids, MI 49525
- Phone
- (616) 267-7125
- Enumerated
- May 30, 2011
- Record last updated
- Mar 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (616) 267-9593
- Medicare enrollment
- Enrolled (PECOS I20160712000142); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 2011
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 137 in Michigan → Look up another NPI →
Also registered at 3271 Clear Vista CT NE
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Emily Addington, PA-CPhysician Assistant1689452575
- Saja Almaaitah, MDRheumatology Physician1073033759
- Bradley Boelkins, M.D.Allergy & Immunology Physician1073908091
- Melissa Brooks, FNPFamily Nurse Practitioner1720263890
- Brett Capel, MDRheumatology Physician1710408000
- Courtney Cotter, DOAllergy & Immunology Physician1023504149
Verify Nicholas L. Hartog in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301108955Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
356 Medicare Part D claims for 68 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of claims.
Most prescribed
- Montelukast Sodium51 claims
- Albuterol Sulfate Hfa28 claims
- Azelastine Hcl27 claims
- Fluticasone Propionate24 claims
- Dupixent Syringe21 claims
- Ipratropium Bromide18 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.
The MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $179,689.69
202 payments; by number, the most common kind was travel and lodging; the largest payer was Pharming Healthcare, Inc. The 2,496 providers of this specialty with any payment received $8,321.81 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.
Bills Medicare through one group practice
- Spectrum Health Primary Care PartnersGrand Rapids, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nicholas L. Hartog among 137 allergy & immunology physician records in Michigan
Nicholas L. Hartog, M.D. is one of 137 allergy & immunology physician records with a practice address in Michigan. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 72% of them.
- NPI issued2011 · 72% of these records are older, 24% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2011 · median 2001 among the 98 with a school on file
- Record last updated2021 · 68% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in Michigan
There are 137 allergy & immunology physician records in Michigan.
All 137 in Michigan → Every provider in Grand Rapids → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Bradley Boelkins, M.D.Grand Rapids, MI 495251073908091
- Nancy Brooke, MDGrand Rapids, MI 495251326090275
- Courtney Cotter, DOGrand Rapids, MI 495251023504149
- Vincent Dubravec, M.D.Grand Rapids, MI 495251346215563
- Jacqueline Eastman Yam, MDGrand Rapids, MI 495251346509692
- Raymond Gonzalez, MDGrand Rapids, MI 495251245287523
- Marisa Hodges, MDGrand Rapids, MI 495251184074809
- Amanda Holsworth, D.O.Grand Rapids, MI 495251811336506
Common questions
What is Nicholas L. Hartog, M.D.'s NPI number?
Nicholas L. Hartog, M.D.'s National Provider Identifier (NPI) is 1669766325, issued on May 30, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Nicholas L. Hartog, M.D. located?
The NPPES record lists a practice address at 3271 Clear Vista CT NE, Grand Rapids, MI, 49525. Phone: (616) 267-7125. Providers update this record themselves, so call before visiting.
How can I verify Nicholas L. Hartog, M.D.'s license?
NPPES lists Michigan license number 4301108955, 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 Nicholas L. Hartog, M.D. prescribe under Medicare Part D?
In 2024, Nicholas L. Hartog, M.D. had 356 Medicare Part D claims for 68 beneficiaries; the average among allergy & immunology physician prescribers was 741. Part D covers Medicare prescriptions only.
What is Nicholas L. Hartog, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.