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MICHELLE MA MD
NPI 1457796153
Internal Medicine - Gastroenterology in Baltimore, MD

Active since May 08, 2013PECOS Enrolled
74.39/100
CMS Quality Rating
600 N WOLFE STREET, BLALOCK 439, BALTIMORE, MD 21287(410) 955-2636(410) 614-8337 Get Directions Write a Review

NPPES record last updated: October 20, 2019. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Michelle Ma Md NPPES

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

MICHELLE MA MD (NPI 1457796153) is an individual gastroenterology provider in Baltimore, Maryland, licensed in Maryland (D87558) and active in the NPI registry since May 2013. She is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Hospital, The, and is a graduate of University Of Michigan Medical School (2013).

NPPES Registry Identity

NPI1457796153
Entity TypeIndividualFemale
Primary Taxonomy207RG0100X
Provider Legal NameMICHELLE MACredential: MD
Location Address600 N WOLFE STREET, BLALOCK 439Baltimore, MD 21287-0005
Mailing Address9910 Franklin Square Dr Ste 2110Baltimore, MD 21236-4902 · (410) 933-6423
Phone(410) 955-2636
Fax(410) 614-8337
Sole ProprietorNo
Medical School CMSUniversity Of Michigan Medical SchoolGraduated 2013
Enumeration DateMay 8, 2013
Last NPPES UpdateOctober 20, 2019
✔ NPI 1457796153 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in MD · D87558
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
Also ListedInternal MedicineTaxonomy 207R00000X · License MT203542 (PA)
600 N WOLFE STREET, Baltimore, MD 21287
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Michelle Ma Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5991094138
PECOS Enrollment IDI20191028002571
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.

Medicare Billing Reassignments

2

Medicare enrollment records show Michelle Ma reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Johns Hopkins University
Same address
Pediatric Allergy/Immunology
600 N WOLFE ST
Baltimore, MD 21287
  • Reassigned Medicare billing, Maryland enrollment
  • 4,483 clinicians in this Medicare group
NPI 1023018413 (410) 933-1182
Johns Hopkins University
Same address
Hepatology
600 N WOLFE ST
Baltimore, MD 21287
  • Reassigned Medicare billing, Maryland enrollment
  • 14 clinicians in this Medicare group
NPI 1063917326 (410) 955-5000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 8

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
177 services51 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
106 services83 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
42 services42 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
29 services29 patients
Biopsy of large bowel using a flexible endoscope 45380
A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.
16 services16 patients
Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
14 services14 patients

Hospital Affiliations CMS Care Compare 2

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

Johns Hopkins Hospital, The

Acute Care Hospitals · Baltimore, MD
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number210009
Location600 North Wolfe StreetBaltimore, MD 21287 · Baltimore City County
Emergency services Birthing friendly

Johns Hopkins Bayview Medical Center

Acute Care Hospitals · Baltimore, MD
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number210029
Location4940 Eastern AvenueBaltimore, MD 21224 · 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
$139.05 typical visit price
range $60.73 – $183.44
Typical copayment $34.76 (range $15.18 – $45.86)
Most-billed visit code 99204
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

74.39/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality64.71
Promoting Interoperability97
Improvement Activities40
Cost52.43

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Tacrolimus, extended release, (envarsus xr), oral, 0.25 mg J7503
Treatment-Chemotherapy · category RH002N
4 suppliers37 claims9,120 services$1.10 avg. paid by Medicare
Mycophenolate mofetil, oral, 250 mg J7517
Treatment-Treatment - Miscellaneous · category RX029N
5 suppliers28 claims2,520 services$0.19 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511
Treatment-Chemotherapy · category RH012N
5 suppliers26 claims26 services$18.89 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512
Treatment-Chemotherapy · category RH012N
3 suppliers24 claims24 services$11.58 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

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

DR. WHITNEY ERIN PARKER MD, PHD
Neurological Surgery
600 N WOLFE STREET, PHIPPS 554
BALTIMORE, MD 21287
Baltimore City (410) 955-7851
RACHEL AARON PHD
Psychologist (Clinical)
600 N WOLFE STREET, MEYER 163
BALTIMORE, MD 21287
Baltimore City (410) 614-4030
ALLISON WEAVER MD
Internal Medicine
600 N WOLFE STREET, MEYER 8-134
BALTIMORE, MD 21287
Baltimore City (410) 614-4474
DR. JANA CHRISTIAN MD
Internal Medicine
600 N WOLFE STREET, MEYER 8-134
BALTIMORE, MD 21287
Baltimore City (410) 614-4474
JESINTHA STEPHENSON MD
Hospitalist
600 N WOLFE STREET, MEYER 8-134
BALTIMORE, MD 21287
Baltimore City (410) 614-4474
HAMILTON MOSES III M.D.
Psychiatry & Neurology (Neurology)
600 N WOLFE STREET, THE JOHNS HOPKINS HOSPITAL
BALTIMORE, MD 21287
Baltimore City (434) 984-2016
DR. GERARD LIMERICK MD
Physical Medicine & Rehabilitation
600 N WOLFE STREET, NELSON 2-131
BALTIMORE, MD 21287
Baltimore City (410) 955-1818
DR. COLIN KANE OD
Optometrist
600 N WOLFE STREET, WILMER 233
BALTIMORE, MD 21287
Baltimore City (410) 955-8679

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 Michelle Ma's NPI number?

The NPI number for Michelle Ma is 1457796153. It was assigned to this individual provider in the NPPES registry on May 8, 2013.

Where is Michelle Ma located?

Michelle Ma practices at 600 N Wolfe Street Blalock 439, Baltimore, MD 21287. The listed phone number is (410) 955-2636.

What is Michelle Ma's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Michelle Ma enrolled in Medicare?

Yes. Michelle Ma is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Michelle Ma's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michelle Ma reassigns Medicare benefits to 2 organizations: Johns Hopkins University (Baltimore, MD) and Johns Hopkins University (Baltimore, MD). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Michelle Ma's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Michelle Ma affiliated with any hospitals?

According to CMS data, Michelle Ma is affiliated with Johns Hopkins Hospital, The and Johns Hopkins Bayview Medical Center.

When was this NPI record last updated?

The NPPES record for Michelle Ma was last updated on October 20, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.