Mary Faith C. Terkildsen, MD
Obstetrics & Gynecology Physician · Lake Forest, IL
Mary Faith C. Terkildsen, MD is an obstetrics & gynecology physician with a practice address in Lake Forest, Illinois, and NPI 1407870199, issued on Jul 26, 2006. Check the license (Illinois 036103018, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Mary Faith C. Terkildsen
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 036103018 IL
Self-reported in NPPES; status is on the state search - Practice location
- 959 S Waukegan RD FL 2, Lake Forest, IL 60045
- Phone
- (847) 234-3250
- Enumerated
- Jul 26, 2006
- Record last updated
- May 7, 2026
- Fax
- (847) 234-7765
- Medicare enrollment
- Enrolled (PECOS I20050830000436); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 1998
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 2,062 in Illinois → Look up another NPI →
Also registered at 959 S Waukegan RD FL 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Caitlin Porter, PA-CPhysician Assistant1639574155
Verify Mary Faith C. Terkildsen 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 036103018Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.6 times the Medicare Part D claims of the average obstetrics & gynecology physician in 2024
591 Medicare Part D claims for 197 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Estradiol252 claims
- Triamcinolone Acetonide28 claims
- Estradiol (Twice Weekly)26 claims
- Clobetasol Propionate23 claims
- Valacyclovir20 claims
- Norethindrone Acetate19 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): 93.1 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).
Bills Medicare through 2 group practices
- Endeavor Health Medical GroupVernon Hills, IL
- OB-Gyne Associates OF Lake Forest LtdGurnee, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Faith C. Terkildsen among 2,062 obstetrics & gynecology physician records in Illinois
Mary Faith C. Terkildsen, 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
- Graduated1998 · median 2006 among the 1,168 with a school on file
- Record last updated2026 · 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).
18 obstetrics & gynecology physician records list a practice address in Lake Forest
They are 18 of the 821 NPPES records with a practice address in Lake Forest, and 2,062 obstetrics & gynecology physician records in Illinois.
All 2,062 in Illinois → Every provider in Lake Forest → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Tanner Colegrove, M.D.Lake Forest, IL 600451003941113
- Robert Hartman, M.D.Lake Forest, IL 600451346336310
- Heather Heiberger, M.D.Lake Forest, IL 600451053330720
- Jill Holden, M.D.Lake Forest, IL 600451548289200
- Tanya Huang, M.D.Lake Forest, IL 600451134141989
- Michael Hubbell, M.D.Lake Forest, IL 600451538181268
- Rebecca Jacobson, MDLake Forest, IL 600451114902483
- Shayna Mancuso, D.O.Lake Forest, IL 600451558394510
Common questions
What is Mary Faith C. Terkildsen, MD's NPI number?
Mary Faith C. Terkildsen, MD's National Provider Identifier (NPI) is 1407870199, issued on Jul 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Faith C. Terkildsen, MD located?
The NPPES record lists a practice address at 959 S Waukegan RD FL 2, Lake Forest, IL, 60045. Phone: (847) 234-3250. Providers update this record themselves, so call before visiting.
How can I verify Mary Faith C. Terkildsen, MD's license?
NPPES lists Illinois license number 036103018, 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 Mary Faith C. Terkildsen, MD prescribe under Medicare Part D?
In 2024, Mary Faith C. Terkildsen, MD had 591 Medicare Part D claims for 197 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Mary Faith C. Terkildsen, MD's MIPS final score?
The 2023 MIPS final score is 93.1 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.