Carolyn Marie Grachen, DO
Internal Medicine Physician · Lone Tree, CO
Carolyn Marie Grachen, DO is an internal medicine physician with a practice address in Lone Tree, Colorado, and NPI 1659073294, issued on Mar 20, 2023. Check the license (Colorado DR.0075574, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Carolyn Marie Grachen
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- DR.0075574 CO
Self-reported in NPPES; status is on the state search - Practice location
- 10101 Ridgegate Pkwy, Lone Tree, CO 80124
- Phone
- (720) 225-1000
- Enumerated
- Mar 20, 2023
- Record last updated
- Jun 16, 2026
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Also registered at 10101 Ridgegate Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sheri BarlowClinical Social Worker1407488620
- Paul Bennett, DOHospitalist Physician1750546495
- Darcie Besel, RNRegistered Nurse1205711991
- Michele BibboNurse Practitioner1396154969
- Ellen Blatt, M.D.Diagnostic Radiology Physician1730165911
Verify Carolyn Marie Grachen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license DR.0075574Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
292 Medicare Part D claims for 59 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium15 claims
- Levothyroxine Sodium12 claims
- Lisinopril12 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.
Carolyn Marie Grachen among 2,046 internal medicine physician records in Colorado
Carolyn Marie Grachen, DO is one of 2,046 internal medicine physician records with a practice address in Colorado. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 98% of them.
- NPI issued2023 · 98% of these records are older, under 1% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2026 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
50 internal medicine physician records list a practice address in Lone Tree
They are 50 of the 1,405 NPPES records with a practice address in Lone Tree, and 2,046 internal medicine physician records in Colorado.
All 2,046 in Colorado → Every provider in Lone Tree → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Christopher Blicharski, M.D.Lone Tree, CO 801241548276975
- David Burrows, MD, FACPLone Tree, CO 801241215072160
- Andrzej Dankowski, MDLone Tree, CO 801241326014507
- Cristian Dinescu, MDLone Tree, CO 801241750302790
- Anna Gutmann, M.D.Lone Tree, CO 801241083887392
- Laura Haseganu, M.D.Lone Tree, CO 801241730347907
- Egor Kuznetsov, M.D.Lone Tree, CO 801241639337165
- Michael Mignoli, MDLone Tree, CO 801241255394722
Common questions
What is Carolyn Marie Grachen, DO's NPI number?
Carolyn Marie Grachen, DO's National Provider Identifier (NPI) is 1659073294, issued on Mar 20, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Carolyn Marie Grachen, DO located?
The NPPES record lists a practice address at 10101 Ridgegate Pkwy, Lone Tree, CO, 80124. Phone: (720) 225-1000. Providers update this record themselves, so call before visiting.
How can I verify Carolyn Marie Grachen, DO's license?
NPPES lists Colorado license number DR.0075574, 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 Carolyn Marie Grachen, DO prescribe under Medicare Part D?
In 2024, Carolyn Marie Grachen, DO had 292 Medicare Part D claims for 59 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.