Maria Oliva-Hemker, M.D.
NPI 1306890801 · Pediatric Gastroenterology Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maria Oliva-Hemker, M.D. is a Pediatric Gastroenterology Physician provider in Baltimore, MD (NPI 1306890801).
Provider details
- NPI number
- 1306890801
- Entity type
- Individual
- Primary specialty
- Pediatric Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- D39176 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$40 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-20
- Last updated
- 2014-02-05
Frequently asked questions
- What is Maria Oliva-Hemker's NPI number?
- Maria Oliva-Hemker's National Provider Identifier (NPI) is 1306890801, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Oliva-Hemker's specialty?
- Maria Oliva-Hemker is listed in the NPPES registry with a primary specialty of Pediatric Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Maria Oliva-Hemker located?
- Maria Oliva-Hemker's practice location on file with NPPES is 601 N Caroline St, Baltimore, MD 21287-0006.
- What is Maria Oliva-Hemker's phone number?
- The practice phone number listed in the NPPES registry for Maria Oliva-Hemker is (410) 955-8769.
- Does Maria Oliva-Hemker accept Medicare?
- Maria Oliva-Hemker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maria Oliva-Hemker's NPI active?
- Yes — Maria Oliva-Hemker's NPI (1306890801) is active in the NPPES registry as of the last update on 2014-02-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.