Katharine Cella Fash, FNP
Nurse Practitioner · Saint Louis, MO
Katharine Cella Fash, FNP is a nurse practitioner with a practice address in Saint Louis, Missouri, and NPI 1598238917, issued on Jan 8, 2019. Check the license (Missouri 2019000563, as entered in NPPES) with the Missouri board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katharine Cella Fash
- Credential
- FNP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 2019000563 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1044 N Mason RD, Saint Louis, MO 63141
- Phone
- (314) 996-8103
- Enumerated
- Jan 8, 2019
- Record last updated
- Jun 19, 2025
- Fax
- (314) 996-3230
- Medicaid ID
- 420070260 MO
- Medicare enrollment
- Enrolled (PECOS I20190410000220); accepts Medicare assignment
- Medical or professional school
- Vanderbilt University School Of Medicine, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1044 N Mason RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christopher Arett, MDUrology Physician1972600559
- Tara Aronberg, PAMedical Physician Assistant1952633976
- Lindsey Becker, PAPhysician Assistant1710648647
- Mary Beindorff, RDRegistered Dietitian1831720655
- Tyler Calkins, MDAdult Reconstructive Orthopaedic Surgery Physician1316501323
- William Chapman, MDColon & Rectal Surgery Physician1003297177
Verify Katharine Cella Fash in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Missouri board licenses this profession
Search for license 2019000563Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average nurse practitioner in 2024
2,271 Medicare Part D claims for 262 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate130 claims
- Atorvastatin Calcium104 claims
- Gabapentin78 claims
- Losartan Potassium75 claims
- Lisinopril71 claims
- Albuterol Sulfate Hfa64 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): 79.3 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: $133.45
3 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 38,884 providers of this specialty with any payment received $791.64 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
- Washington UniversitySaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
437 nurse practitioner records list a practice address in Saint Louis
They are 437 of the 27,605 NPPES records with a practice address in Saint Louis, and 1,720 nurse practitioner records in Missouri.
All 437 in Saint Louis → All 1,720 in Missouri → Every provider in Saint Louis →
Other nurse practitioner records in Missouri
- Caitlin Aaron, NP-CLees Summit, MO1649934340
- Sarah Abaricia, FNPSaint Peters, MO1447709365
- Maureen Abongo, DNPSaint Louis, MO1225819048
- Hawo AbukarBlue Springs, MO1841135084
- Morgan Ackerman, NPChesterfield, MO1811625676
- Yolanda Acklin, NPFlorissant, MO1881790996
- Alina Adams, NPRichmond Heights, MO1003393513
- Dorothy Adams, NPHolden, MO1043274210
- Holly Adams, MSN, FNP-BCDoniphan, MO1841899614
- Lindsey Adams, NP-CFenton, MO1326611757
Common questions
What is Katharine Cella Fash, FNP's NPI number?
Katharine Cella Fash, FNP's National Provider Identifier (NPI) is 1598238917, issued on Jan 8, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Katharine Cella Fash, FNP located?
The NPPES record lists a practice address at 1044 N Mason RD, Saint Louis, MO, 63141. Phone: (314) 996-8103. Providers update this record themselves, so call before visiting.
How can I verify Katharine Cella Fash, FNP's license?
NPPES lists Missouri license number 2019000563, as entered by the provider. Search the Missouri board that licenses this profession; the NPPES record confirms identity only.
How much does Katharine Cella Fash, FNP prescribe under Medicare Part D?
In 2024, Katharine Cella Fash, FNP had 2,271 Medicare Part D claims for 262 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.
What is Katharine Cella Fash, FNP's MIPS final score?
The 2023 MIPS final score is 79.3 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.