Erica R. Drennen, MD
Obstetrics & Gynecology Physician · Parker, CO
Erica R. Drennen, MD is an obstetrics & gynecology physician with a practice address in Parker, Colorado, and NPI 1982804837, issued on Jul 19, 2007. Check the license (Colorado 50069, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Erica R. Drennen
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 50069 CO
Self-reported in NPPES; status is on the state search - Practice location
- 9403 Crown Crest Blvd Ste 200, Parker, CO 80138
- Phone
- (720) 721-1670
- Enumerated
- Jul 19, 2007
- Record last updated
- Mar 7, 2023
- Fax
- (720) 721-8117
- Medicaid ID
- 33584281 CO
- Medicare enrollment
- Enrolled (PECOS I20111104000058); accepts Medicare assignment
- Medical or professional school
- Ohio State University College Of Medicine, 2007
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 906 in Colorado → Look up another NPI →
Also registered at 9403 Crown Crest Blvd Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rebecca Douglas, PA-CPhysician Assistant1194454082
- Erin Drake, MDObstetrics Physician1982223988
- Elizabeth Foland, PA-CSurgical Physician Assistant1134451412
- Ronald Hammers, M.D.Neurological Surgery Physician1730340324
- Kaitlyn Kalamula, PA-CPhysician Assistant1609476878
- Andrea Kessel, WHNPWomen's Health Nurse Practitioner1417326679
Verify Erica R. Drennen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 50069Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
68% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
52 Medicare Part D claims for 18 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 35% of claims.
Most prescribed
- Estradiol15 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): 77.2 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).
Bills Medicare through one group practice
- Portercare Adventist Health SystemAurora, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Erica R. Drennen among 906 obstetrics & gynecology physician records in Colorado
Erica R. Drennen, MD is one of 906 obstetrics & gynecology physician records with a practice address in Colorado. 69% 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 43% of them.
- NPI issued2007 · 43% of these records are older, 39% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated2007 · median 2008 among the 504 with a school on file
- Record last updated2023 · 60% 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 Colorado 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 Parker
They are 18 of the 1,871 NPPES records with a practice address in Parker, and 906 obstetrics & gynecology physician records in Colorado.
All 906 in Colorado → Every provider in Parker → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Elizabeth Duke, MDParker, CO 801381487674925
- Heidi Gage, MDParker, CO 801381154336683
- Candice Geist, D.O.Parker, CO 801381003175696
- Lorie Jones, MDParker, CO 801381346238235
- Chia-Hui Lee, MDParker, CO 801381689650277
- Sunmee Lee, MDParker, CO 801381336228063
- Randi McVay, M.D.Parker, CO 801381215082276
- Cassandra Ragsdale, M.D.Parker, CO 801381124389788
Common questions
What is Erica R. Drennen, MD's NPI number?
Erica R. Drennen, MD's National Provider Identifier (NPI) is 1982804837, issued on Jul 19, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Erica R. Drennen, MD located?
The NPPES record lists a practice address at 9403 Crown Crest Blvd Ste 200, Parker, CO, 80138. Phone: (720) 721-1670. Providers update this record themselves, so call before visiting.
How can I verify Erica R. Drennen, MD's license?
NPPES lists Colorado license number 50069, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Erica R. Drennen, MD prescribe under Medicare Part D?
In 2024, Erica R. Drennen, MD had 52 Medicare Part D claims for 18 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Erica R. Drennen, MD's MIPS final score?
The 2023 MIPS final score is 77.2 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.