Katherine Gruber Wafer, CRNP
Family Nurse Practitioner · Hagerstown, MD
Katherine Gruber Wafer, CRNP is a family nurse practitioner with a practice address in Hagerstown, Maryland, and NPI 1164617379, issued on Sep 11, 2007. Check the license (Maryland R164999, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katherine Gruber Wafer
- Credential
- CRNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License numbers
- R164999 MD
4704339284 MI
Self-reported in NPPES; status is on the state search - Practice location
- 201 S Cleveland Ave, Hagerstown, MD 21740
- Phone
- (301) 745-3777
- Enumerated
- Sep 11, 2007
- Record last updated
- Mar 4, 2026
- Medicare enrollment
- Enrolled (PECOS I20260107003946); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 4,124 in Maryland → Look up another NPI →
Also registered at 201 S Cleveland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Katherine Gruber Wafer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license R164999Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% fewer Medicare Part D claims than the average family nurse practitioner in 2024
786 Medicare Part D claims for 178 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Atorvastatin Calcium49 claims
- Levothyroxine Sodium28 claims
- Metformin Hcl26 claims
- Prednisone25 claims
- Lisinopril24 claims
- Omeprazole23 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.
Industry payments in 2024: $16.65
1 payment: food and beverage; the largest payer was Lilly USA, LLC. The 99,489 providers of this specialty with any payment received $650.95 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 3 group practices
- Crh MD Management LLCHagerstown, MD
- Meritus Medical Center IncHagerstown, MD
- Post Acute Telehealth PCFayetteville, WV
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Gruber Wafer among 4,124 family nurse practitioner records in Maryland
Katherine Gruber Wafer, CRNP is one of 4,124 family nurse practitioner records with a practice address in Maryland. 74% 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 7% of them.
- NPI issued2007 · 7% of these records are older, 89% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2017 · median 2019 among the 2,370 with a school on file
- Record last updated2026 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
115 family nurse practitioner records list a practice address in Hagerstown
They are 115 of the 2,414 NPPES records with a practice address in Hagerstown, and 4,124 family nurse practitioner records in Maryland.
All 4,124 in Maryland → Every provider in Hagerstown → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Ann Beauchamp, CRNPHagerstown, MD 217401023296019
- Teresa Dumpe, CRNPHagerstown, MD 217401003845975
- Elizabeth Fields, MSN, CRNPHagerstown, MD 217401851751341
- Catherine Hays, CRNP-FHagerstown, MD 217401194816066
- Rachael Johnson, CRNP-FHagerstown, MD 217401194029397
- Lynne Kline, CRNPHagerstown, MD 217401679576888
- Susan Lange, CRNPHagerstown, MD 217401811092364
- Joyce Lee, CRNP-FHagerstown, MD 217401356322614
Common questions
What is Katherine Gruber Wafer, CRNP's NPI number?
Katherine Gruber Wafer, CRNP's National Provider Identifier (NPI) is 1164617379, issued on Sep 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Gruber Wafer, CRNP located?
The NPPES record lists a practice address at 201 S Cleveland Ave, Hagerstown, MD, 21740. Phone: (301) 745-3777. Providers update this record themselves, so call before visiting.
How can I verify Katherine Gruber Wafer, CRNP's license?
NPPES lists Maryland license number R164999, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does Katherine Gruber Wafer, CRNP prescribe under Medicare Part D?
In 2024, Katherine Gruber Wafer, CRNP had 786 Medicare Part D claims for 178 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.