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MARRISSA LEIGH BAKER M.D.
NPI 1669771986
Emergency Medicine in Baltimore, MD

Active since March 25, 2011PECOS EnrolledAccepts Medicare Assignment
JOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE, 1830 MONUMENT STREET SUITE 6-100, BALTIMORE, MD 21287(410) 955-5107 Get Directions Write a Review

NPPES record last updated: October 13, 2017. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Feb 12, 2016, Jan 11, 2016 (2 updates tracked since 2016).

About Marrissa Leigh Baker M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARRISSA LEIGH BAKER M.D. (NPI 1669771986) is an individual emergency medicine provider in Baltimore, Maryland, licensed in Pennsylvania (MD462521) and active in the NPI registry since March 2011. She is enrolled in Medicare PECOS, is affiliated with Saint Agnes Hospital, and is a graduate of Washington University School Of Medicine (2011).

NPPES Registry Identity

NPI1669771986
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameMARRISSA LEIGH BAKERCredential: M.D.
Location AddressJOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE, 1830 MONUMENT STREET SUITE 6-100Baltimore, MD 21287-0020
Mailing Address403 Virginia AveEssex, MD 21221-6858 · (310) 365-1172
Phone(410) 955-5107
Sole ProprietorNo
Medical School CMSWashington University School Of MedicineGraduated 2011
Enumeration DateMarch 25, 2011
Last NPPES UpdateOctober 13, 20172 updates tracked since enumeration
✔ NPI 1669771986 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in PA · MD462521✔ Licensed in MD · D0079093
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
JOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE, Baltimore, MD 21287
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Molina Healthcare.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Marrissa Leigh Baker M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8628227170
PECOS Enrollment IDI20150812008570
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
31 services30 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
22 services21 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Saint Agnes Hospital

Acute Care Hospitals · Baltimore, MD
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number210011
Location900 Caton AvenueBaltimore, MD 21229 · Baltimore City County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21287 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$94.08 typical visit price
range $60.73 – $183.44
Typical copayment $23.52 (range $15.18 – $45.86)
Most-billed visit code 99203
Established Patient
$106.59 typical visit price
range $19.60 – $149.17
Typical copayment $26.64 (range $4.90 – $37.29)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ANNA V. AGRANOVICH PH.D.
Psychologist (Rehabilitation)
JOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE, 600 N. WOLFE STREET
BALTIMORE, MD 21287
Baltimore City (919) 360-5656
JOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE
General Acute Care Hospital
JOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE, 600 NORTH WOLFE STREET/CMSC 340
BALTIMORE, MD 21287
Baltimore City (410) 955-8021
DR. GITA SINHA MD
Internal Medicine (Infectious Disease)
JOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE, 600 N. WOLFE STREET
BALTIMORE, MD 21287
Baltimore City (410) 502-2032

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marrissa Baker's NPI number?

The NPI number for Marrissa Baker is 1669771986. It was assigned to this individual provider in the NPPES registry on March 25, 2011.

Where is Marrissa Baker located?

Marrissa Baker practices at Johns Hopkins University School Of Medicine 1830 Monument Street Suite 6-100, Baltimore, MD 21287. The listed phone number is (410) 955-5107.

What is Marrissa Baker's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Marrissa Baker enrolled in Medicare?

Yes. Marrissa Baker is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Marrissa Baker accept?

Health plans from Molina Healthcare list Marrissa Baker as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Marrissa Baker affiliated with any hospitals?

According to CMS data, Marrissa Baker is affiliated with Saint Agnes Hospital.

When was this NPI record last updated?

The NPPES record for Marrissa Baker was last updated on October 13, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.