Jennifer Lani Hallock, M.D.
Obstetrics & Gynecology Physician · Baltimore, MD
Jennifer Lani Hallock, M.D. is an obstetrics & gynecology physician with a practice address in Baltimore, Maryland, and NPI 1225355951, issued on Apr 20, 2010. Check the license (Maryland 5255, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Jennifer Lani Hallock
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 5255 MD
Self-reported in NPPES; status is on the state search - Practice location
- 4940 Eastern Ave, Baltimore, MD 21224
- Phone
- (858) 663-1540
- Enumerated
- Apr 20, 2010
- Record last updated
- Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20171030003393); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Columbia School Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,034 in Maryland → Look up another NPI →
Also registered at 4940 Eastern Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jared Abay, PA-CSurgical Physician Assistant1659427342
- Alexandra Abbate, MDObstetrics & Gynecology Physician1194287003
- Anas AbdullahStudent in an Organized Health Care Education/Training Program1184040917
- Asma Abeer, PA-CMedical Physician Assistant1386356442
- Mona Abraham, MDStudent in an Organized Health Care Education/Training Program1245807395
- Sherifatu Abu, MDInternal Medicine Physician1093372922
Verify Jennifer Lani Hallock in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license 5255Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.7 times the Medicare Part D claims of the average obstetrics & gynecology physician in 2024
616 Medicare Part D claims for 264 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims. 20 claims were for opioids.
Most prescribed
- Myrbetriq94 claims
- Estradiol83 claims
- Cefadroxil47 claims
- Trospium Chloride43 claims
- Estring42 claims
- Mirabegron Er39 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: $44.25
2 payments; by number, the most common kind was food and beverage; the largest payer was Boston Scientific Corporation. The 21,429 providers of this specialty with any payment received $1,030.61 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
- Permanente Medical Group IncSacramento, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jennifer Lani Hallock among 1,034 obstetrics & gynecology physician records in Maryland
Jennifer Lani Hallock, M.D. is one of 1,034 obstetrics & gynecology physician records with a practice address in Maryland. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 66% of them.
- NPI issued2010 · 66% of these records are older, 30% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2010 · median 2005 among the 597 with a school on file
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Maryland
There are 1,034 obstetrics & gynecology physician records in Maryland.
All 1,034 in Maryland → Every provider in Baltimore → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Abimbola Aina, M.D.Baltimore, MD 212241366405045
- Kristiina Altman, M.D.Baltimore, MD 212241790741353
- Douglas Bourque, MDBaltimore, MD 212241427054907
- Anne Burke, M.D.Baltimore, MD 212241831157320
- Chi Chiung Grace Chen, MDBaltimore, MD 212241497796593
- Betty Chou, M.D.Baltimore, MD 212241669423760
- Donald Garland, DOBaltimore, MD 212241184624884
- Janice Henderson, M.D.Baltimore, MD 212241215987383
Common questions
What is Jennifer Lani Hallock, M.D.'s NPI number?
Jennifer Lani Hallock, M.D.'s National Provider Identifier (NPI) is 1225355951, issued on Apr 20, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Jennifer Lani Hallock, M.D. located?
The NPPES record lists a practice address at 4940 Eastern Ave, Baltimore, MD, 21224. Phone: (858) 663-1540. Providers update this record themselves, so call before visiting.
How can I verify Jennifer Lani Hallock, M.D.'s license?
NPPES lists Maryland license number 5255, as entered by the provider. 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 Jennifer Lani Hallock, M.D. prescribe under Medicare Part D?
In 2024, Jennifer Lani Hallock, M.D. had 616 Medicare Part D claims for 264 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.