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DR. JOHN C GREENAWALT M.D.
NPI 1699783795
Internal Medicine in Baltimore, MD

Active since August 04, 2006PECOS EnrolledAccepts Medicare Assignment
6701 N CHARLES ST, DEPT OF MEDICINE RM 4890, BALTIMORE, MD 21204(443) 849-8046 Get Directions Write a Review

NPPES record last updated: July 13, 2007. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. John C Greenawalt M.d. NPPES

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

DR. JOHN C GREENAWALT M.D. (NPI 1699783795) is an individual internal medicine provider in Baltimore, Maryland, licensed in Maryland (D60248) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Greater Baltimore Medical Center, and is a graduate of Other (2000).

NPPES Registry Identity

NPI1699783795
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. JOHN C GREENAWALTCredential: M.D.
Location Address6701 N CHARLES ST, DEPT OF MEDICINE RM 4890Baltimore, MD 21204-6808
Mailing AddressPo Box 631568Baltimore, MD 21263-1568
Phone(443) 849-8046
Sole ProprietorNo
Medical School CMSOtherGraduated 2000
Enumeration DateAugust 4, 2006
Last NPPES UpdateJuly 13, 2007
✔ NPI 1699783795 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MD · D60248
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedHospitalistTaxonomy 208M00000X · License D60248 (MD)
6701 N CHARLES ST, Baltimore, MD 21204
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Other Identifiers 4

OtherKJ15GB/62225001MD · Carefirst Maryland
Medicare UPINH85464
Medicare PIN725LG176MD
OtherS138-0067MD · Carefirst Regional

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

Dr. John C Greenawalt 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 ID749305118
PECOS Enrollment IDI20100909000461
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 3

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.
113 services57 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
23 services18 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
19 services19 patients

Hospital Affiliations CMS Care Compare

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

Greater Baltimore Medical Center

Acute Care Hospitals · Baltimore, MD
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number210044
Location6701 North Charles StreetBaltimore, MD 21204 · Baltimore County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21204 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.

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.

MRS. ALVENA MESHOINE SIMS PA-C, MMS
Physician Assistant
6701 N CHARLES ST, LABOR & DELIVERY
BALTIMORE, MD 21204
Baltimore County (443) 849-2577
DR. LEWIS HOGGE M.D.
Anesthesiology
6701 N CHARLES ST
TOWSON, MD 21204
Baltimore County (410) 296-4616
DR. PHILIP E SHAHEEN M.D.
Internal Medicine (Hospice and Palliative Medicine)
6701 N CHARLES ST, SUITE 4105
BALTIMORE, MD 21204
Baltimore County (443) 849-6255
ALOISE DIEDRICH
Anesthesiology
6701 N CHARLES ST
TOWSON, MD 21204
Baltimore County (443) 849-2000
ROBERT A. PALERMO M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
6701 N CHARLES ST
BALTIMORE, MD 21204
Baltimore County (443) 849-2257
DR. STEPHEN A LIVERMAN M.D.
Pediatrics
6701 N CHARLES ST, DEPT OF PEDIATRICS
BALTIMORE, MD 21204
Baltimore County (443) 849-2792
NATHAN A. DUNSMORE M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
6701 N CHARLES ST
BALTIMORE, MD 21204
Baltimore County (443) 849-2704
MS. SHARON MAREE ELMES-CURTIS CNM
Advanced Practice Midwife
6701 N CHARLES ST, DEPT OF LABOR AND DELIVERY
BALTIMORE, MD 21204
Baltimore County (443) 849-2577

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 John Greenawalt's NPI number?

The NPI number for John Greenawalt is 1699783795. It was assigned to this individual provider in the NPPES registry on August 4, 2006.

Where is John Greenawalt located?

John Greenawalt practices at 6701 N Charles St Dept Of Medicine Rm 4890, Baltimore, MD 21204. The listed phone number is (443) 849-8046.

What is John Greenawalt's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is John Greenawalt enrolled in Medicare?

Yes. John Greenawalt 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.

Is John Greenawalt affiliated with any hospitals?

According to CMS data, John Greenawalt is affiliated with Greater Baltimore Medical Center.

When was this NPI record last updated?

The NPPES record for John Greenawalt was last updated on July 13, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.