Clarissa S. Geyer, M.D.
Hematology & Oncology Physician · Morristown, TN
Clarissa S. Geyer, M.D. is a hematology & oncology physician with a practice address in Morristown, Tennessee, and NPI 1528264223, issued on Jun 21, 2007. Check the license (Tennessee MD0000034568, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Clarissa S. Geyer
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- MD0000034568 TN
Self-reported in NPPES; status is on the state search - Practice location
- 908 W 4TH North St, Morristown, TN 37814
- Phone
- (423) 522-4900
- Enumerated
- Jun 21, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (423) 522-4901
- Medicare enrollment
- Enrolled (PECOS I20070824000131); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 273 in Tennessee → Look up another NPI →
Also registered at 908 W 4TH North St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Abernathy, MDFamily Medicine Physician1427146539
- Sajid Ahmed, MDMedical Oncology Physician1497858591
- Matthew Allison, M.D.Internal Medicine Physician1245680933
- Kimberly Arrowood, ANP-BC, GNP-BCAdult Health Nurse Practitioner1164677647
- Sarah Barnard, RNRegistered Nurse1982546362
- Frank Beuerlein, MDAnatomic Pathology & Clinical Pathology Physician1487623484
Verify Clarissa S. Geyer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license MD0000034568Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
637 Medicare Part D claims for 81 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Anastrozole48 claims
- Levothyroxine Sodium47 claims
- Eliquis45 claims
- Promethazine Hcl35 claims
- Potassium Chloride32 claims
- Hydroxyurea29 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): 95.7 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: $1,970.55
88 payments; by number, the most common kind was food and beverage; the largest payer was Celgene Corporation. The 8,560 providers of this specialty with any payment received $7,481.41 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
- University Health System, Inc.Knoxville, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Clarissa S. Geyer among 273 hematology & oncology physician records in Tennessee
Clarissa S. Geyer, M.D. is one of 273 hematology & oncology physician records with a practice address in Tennessee. 89% 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 47% of them.
- NPI issued2007 · 47% of these records are older, 41% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated1989 · median 2004 among the 223 with a school on file
- Record last updated2007 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Tennessee
There are 273 hematology & oncology physician records in Tennessee.
All 273 in Tennessee → Every provider in Morristown → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Alay Mansurov, M.D.Morristown, TN 378141033592035
- S McCachren, MDMaryville, TN 378041639149867
- Matthew McCarty, MDMaryville, TN 378041184694333
- John Foust, MDOak Ridge, TN 378301205834835
- Catherine Murphree, MDOak Ridge, TN 378301578067286
- Thomas Repine, MDOak Ridge, TN 378301245324938
- Trena Stoute, MDOak Ridge, TN 378301588003719
- Michael Thompson, MDOak Ridge, TN 378301023016631
Common questions
What is Clarissa S. Geyer, M.D.'s NPI number?
Clarissa S. Geyer, M.D.'s National Provider Identifier (NPI) is 1528264223, issued on Jun 21, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Clarissa S. Geyer, M.D. located?
The NPPES record lists a practice address at 908 W 4TH North St, Morristown, TN, 37814. Phone: (423) 522-4900. Providers update this record themselves, so call before visiting.
How can I verify Clarissa S. Geyer, M.D.'s license?
NPPES lists Tennessee license number MD0000034568, as entered by the provider. Search the Tennessee Board of Medical Examiners at https://www.tn.gov/health/licensure/me.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Clarissa S. Geyer, M.D. prescribe under Medicare Part D?
In 2024, Clarissa S. Geyer, M.D. had 637 Medicare Part D claims for 81 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Clarissa S. Geyer, M.D.'s MIPS final score?
The 2023 MIPS final score is 95.7 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.