Maria Isabel Villegas Kastner, M.D.
Nephrology Physician · Baltimore, MD
Maria Isabel Villegas Kastner, M.D. is a nephrology physician with a practice address in Baltimore, Maryland, and NPI 1154859429, issued on May 31, 2017. Check the license on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Maria Isabel Villegas Kastner
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 2022-02410 NC
Self-reported in NPPES; status is on the state search - Practice location
- 1830 E Monument St Ste 416, Baltimore, MD 21287
- Phone
- (410) 502-7070
- Enumerated
- May 31, 2017
- Record last updated
- Nov 16, 2022
- Medicare enrollment
- Enrolled (PECOS I20221107002781); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 337 in Maryland → Look up another NPI →
Also registered at 1830 E Monument St Ste 416
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sai Prasad Desikan, MDNephrology Physician1013414861
- Kirollos Eskander, MDStudent in an Organized Health Care Education/Training Program1801532148
- Samir Gautam, MDNephrology Physician1275766396
- Dina Gonzalez Hernandez, MDStudent in an Organized Health Care Education/Training Program1992440671
- Keiko GreenbergNephrology Physician1588807408
- Rekha Kambhampati, M.D.Student in an Organized Health Care Education/Training Program1245656735
Verify Maria Isabel Villegas Kastner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of PhysiciansCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% fewer Medicare Part D claims than the average nephrology physician in 2024
1,230 Medicare Part D claims for 224 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Furosemide124 claims
- Amlodipine Besylate78 claims
- Allopurinol75 claims
- Lisinopril68 claims
- Losartan Potassium64 claims
- Carvedilol62 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: $394.30
11 payments; by number, the most common kind was food and beverage; the largest payer was GlaxoSmithKline, LLC. 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 2 group practices
- Unc Physicians Network LLCSanford, NC
- University OF North Carolina AT Chapel HillChapel Hill, NC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maria Isabel Villegas Kastner among 337 nephrology physician records in Maryland
Maria Isabel Villegas Kastner, M.D. is one of 337 nephrology physician records with a practice address in Maryland. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 88% of them.
- NPI issued2017 · 88% of these records are older, 10% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2011 · median 2001 among the 232 with a school on file
- Record last updated2022 · 56% 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 Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Maryland
There are 337 nephrology physician records in Maryland.
All 337 in Maryland → Every provider in Baltimore → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Nada Alachkar, M.D.Baltimore, MD 212871164480653
- Mohamed Atta, M.D.Baltimore, MD 212871417912262
- Daniel Brennan, MDBaltimore, MD 212871023036597
- Michael Choi, M.D.Baltimore, MD 212871487606372
- Michelle Estrella, M.D.Baltimore, MD 212871932152196
- Derek Fine, M.D.Baltimore, MD 212871174559868
- Gregory Germino, M.D.Baltimore, MD 212871659319937
- Morgan Grams, M.D.Baltimore, MD 212871780876722
Common questions
What is Maria Isabel Villegas Kastner, M.D.'s NPI number?
Maria Isabel Villegas Kastner, M.D.'s National Provider Identifier (NPI) is 1154859429, issued on May 31, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Maria Isabel Villegas Kastner, M.D. located?
The NPPES record lists a practice address at 1830 E Monument St Ste 416, Baltimore, MD, 21287. Phone: (410) 502-7070. Providers update this record themselves, so call before visiting.
How can I verify Maria Isabel Villegas Kastner, M.D.'s license?
Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Maria Isabel Villegas Kastner, M.D. prescribe under Medicare Part D?
In 2024, Maria Isabel Villegas Kastner, M.D. had 1,230 Medicare Part D claims for 224 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.