Cynthia K. Marsh, NP
Nephrology Physician · Johnson City, TN
Cynthia K. Marsh, NP is a nephrology physician with a practice address in Johnson City, Tennessee, and NPI 1407363989, issued on Jan 5, 2018. Check the license (Tennessee 23627, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Cynthia K. Marsh
- Credential
- NP
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 23627 TN
Self-reported in NPPES; status is on the state search - Practice location
- 107 Woodlawn Dr Ste 200, Johnson City, TN 37604
- Phone
- (423) 929-7158
- Enumerated
- Jan 5, 2018
- Record last updated
- Jan 5, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (423) 928-9625
- Medicare enrollment
- Enrolled (PECOS I20180723000510); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 266 in Tennessee → Look up another NPI →
Also registered at 107 Woodlawn Dr Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Muhammad Owais Malik, MDNephrology Physician1376910208
- Samardia Missick, MDNephrology Physician1720498777
Verify Cynthia K. Marsh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 23627Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% fewer Medicare Part D claims than the average nephrology physician in 2024
1,222 Medicare Part D claims for 202 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims.
Most prescribed
- Sevelamer Carbonate150 claims
- Lidocaine-Prilocaine70 claims
- Furosemide67 claims
- Xphozah63 claims
- Clinisol51 claims
- Velphoro50 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): 81.5 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: $1,290.69
71 payments; by number, the most common kind was food and beverage; the largest payer was Travere Therapeutics, Inc. The 8,230 providers of this specialty with any payment received $3,091.37 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
- East Tennessee Medical Associates, P.C.Johnson City, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cynthia K. Marsh among 266 nephrology physician records in Tennessee
Cynthia K. Marsh, NP is one of 266 nephrology physician records with a practice address in Tennessee. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 91% of them.
- NPI issued2018 · 91% of these records are older, 6% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2017 · median 2002 among the 186 with a school on file
- Record last updated2018 · 44% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Tennessee
There are 266 nephrology physician records in Tennessee.
All 266 in Tennessee → Every provider in Johnson City → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Lara Kfoury, M.D.Johnson City, TN 376041700074416
- Muhammad Owais Malik, MDJohnson City, TN 376041376910208
- Samardia Missick, MDJohnson City, TN 376041720498777
- Leslie Panus, M.D.Johnson City, TN 376041063416089
- Martin Tran, D.O.Johnson City, TN 376041851395891
- Stanley Vermillion, MDJohnson City, TN 376041699779629
- Clifford Wiegand, MDJohnson City, TN 376041588669170
- Douglass Green, MDBristol, TN 376201871590166
Common questions
What is Cynthia K. Marsh, NP's NPI number?
Cynthia K. Marsh, NP's National Provider Identifier (NPI) is 1407363989, issued on Jan 5, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Cynthia K. Marsh, NP located?
The NPPES record lists a practice address at 107 Woodlawn Dr Ste 200, Johnson City, TN, 37604. Phone: (423) 929-7158. Providers update this record themselves, so call before visiting.
How can I verify Cynthia K. Marsh, NP's license?
NPPES lists Tennessee license number 23627, 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 Cynthia K. Marsh, NP prescribe under Medicare Part D?
In 2024, Cynthia K. Marsh, NP had 1,222 Medicare Part D claims for 202 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Cynthia K. Marsh, NP's MIPS final score?
The 2023 MIPS final score is 81.5 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.