Karyn Grimm Herndon, MD
Obstetrics & Gynecology Physician · Glenview, IL
Karyn Grimm Herndon, MD is an obstetrics & gynecology physician with a practice address in Glenview, Illinois, and NPI 1407805922, issued on May 10, 2006. Check the license (Illinois 036079223, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Karyn Grimm Herndon
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 036079223 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3633 W Lake Ave, Glenview, IL 60026
- Phone
- (847) 729-2240
- Enumerated
- May 10, 2006
- Record last updated
- Jan 24, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 036079223 IL
- Medicare enrollment
- Enrolled (PECOS I20060814000291); accepts Medicare assignment
- Medical or professional school
- University Of Florida College Of Medicine, 1986
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 2,062 in Illinois → Look up another NPI →
Also registered at 3633 W Lake Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Colette Ahlberg, M.S.W.Clinical Social Worker1164510723
- Gabriel Berlin, M.D.Internal Medicine Physician1831296474
- Robert Bloom, M.D.Psychiatry Physician1609850932
- Jeffery Bressman, DDSOral and Maxillofacial Surgery (Dentist)1154345106
- Steven Charous, M.D.Otolaryngology Physician1861456022
- Thomas Connell, D.D.S.Dentist1740427590
Verify Karyn Grimm Herndon 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 036079223Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
228 Medicare Part D claims for 86 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Estradiol71 claims
- Alendronate Sodium19 claims
- Clotrimazole-Betamethasone18 claims
- Medroxyprogesterone Acetate14 claims
- Estring12 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 practice group's MIPS final score for 2023 (Medicare payment program): 75.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $35.20
1 payment: food and beverage; the largest payer was Medtronic, Inc. The 21,429 providers of this specialty with any payment received $1,030.61 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
- Midwest Center For Women's Healthcare, LtdEvanston, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karyn Grimm Herndon among 2,062 obstetrics & gynecology physician records in Illinois
Karyn Grimm Herndon, MD is one of 2,062 obstetrics & gynecology physician records with a practice address in Illinois. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1986 · median 2006 among the 1,168 with a school on file
- Record last updated2020 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Illinois
There are 2,062 obstetrics & gynecology physician records in Illinois.
All 2,062 in Illinois → Every provider in Glenview → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Joyce Chams, M.D.Glenview, IL 600261114035110
- Carol Ellman, MDGlenview, IL 600261588613954
- Elizabeth Forbes, MDGlenview, IL 600261720038334
- Narissa Hoprasart, MDGlenview, IL 600261649223496
- Ronald Miller, MDGlenview, IL 600261639129455
- Jeremy Miller, MDGlenview, IL 600261942250568
- Allison Rodgers, M.D.Glenview, IL 600261568664092
- Joanna Ryan, M.DGlenview, IL 600261699200568
Common questions
What is Karyn Grimm Herndon, MD's NPI number?
Karyn Grimm Herndon, MD's National Provider Identifier (NPI) is 1407805922, issued on May 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karyn Grimm Herndon, MD located?
The NPPES record lists a practice address at 3633 W Lake Ave, Glenview, IL, 60026. Phone: (847) 729-2240. Providers update this record themselves, so call before visiting.
How can I verify Karyn Grimm Herndon, MD's license?
NPPES lists Illinois license number 036079223, 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 Karyn Grimm Herndon, MD prescribe under Medicare Part D?
In 2024, Karyn Grimm Herndon, MD had 228 Medicare Part D claims for 86 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Karyn Grimm Herndon, MD's MIPS final score?
The 2023 MIPS final score is 75.4 of 100, reported for the practice group. 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.