DR. CALVIN WILLIAM PARKER III M.D.
NPI 1073654976
Internal Medicine in Baltimore, MD

Q: What is Calvin Parker's NPI number?

The NPI number for Calvin Parker is 1073654976. It was assigned to this individual provider in the NPPES registry on February 12, 2007.

Q: What is Calvin Parker's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Calvin Parker was last updated on March 9, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.

Active since February 12, 2007PECOS Enrolled

84.79/100

CMS Quality Rating

1838 GREENE TREE RD, SUITE 400, BALTIMORE, MD 21208(410) 602-7782(410) 602-2438 Get Directions Write a Review

NPPES record last updated: March 9, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 9, 2022, Aug 23, 2016 (2 updates tracked since 2016).

On this page

About Dr. Calvin William Parker Iii M.d. NPPES

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

DR. CALVIN WILLIAM PARKER III M.D. (NPI 1073654976) is an individual internal medicine provider in Baltimore, Maryland, licensed in Maryland (D81266) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS, is affiliated with Sinai Hospital Of Baltimore, and is a graduate of Howard University College Of Medicine (2004).

NPPES Registry Identity

NPI1073654976

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. CALVIN WILLIAM PARKER IIICredential: M.D.

Location Address1838 GREENE TREE RD, SUITE 400Baltimore, MD 21208-6391

Mailing Address1838 Greene Tree Rd, Suite 400Baltimore, MD 21208-6391 · (410) 602-7782 · Fax (410) 602-2438

Phone(410) 602-7782

Fax(410) 602-2438

Sole ProprietorNo

Medical School CMSHoward University College Of MedicineGraduated 2004

Enumeration DateFebruary 12, 2007

Last NPPES UpdateMarch 9, 20222 updates tracked since enumeration

NPPES CertifiedMarch 9, 2022

✔ NPI 1073654976 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

Licenses✔ Licensed in MD · D81266✔ Licensed in GA · 057556

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.

1838 GREENE TREE RD, Baltimore, MD 21208

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Calvin William Parker Iii M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5496932931

PECOS Enrollment IDI20160720002247

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

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

Lifebridge Community Gastroenterology, LLC

Same address

Gastroenterology

1838 GREENE TREE RD, SUITE 400
Pikesville, MD 21208

Reassigned Medicare billing, Maryland enrollment
103 clinicians in this Medicare group

NPI 1033558416 (410) 602-7782

Sinai Hospital Of Baltimore Inc

1.0 mi

Surgery

21 CROSSROADS DR STE 360
Owings Mills, MD 21117

Reassigned Medicare billing, Maryland enrollment
664 clinicians in this Medicare group

NPI 1891705430 (410) 601-5524

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 14

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.

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

281 services281 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

111 services98 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.

93 services88 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

84 services84 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

79 services78 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.

63 services63 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.

58 services58 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

46 services46 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

32 services32 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

25 services25 patients

Emergency department visit with straightforward medical decision making 99282

An emergency department visit for a mild to moderate issue is when you seek immediate medical attention for a non-life-threatening condition. This could include minor injuries, moderate pain, or illnesses like the flu. During the visit, healthcare professionals assess your condition, provide treatment, and may recommend follow-up care.

23 services22 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

19 services19 patients

Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235

This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.

18 services18 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

18 services16 patients

Hospital Affiliations CMS Care Compare 3

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

Sinai Hospital Of Baltimore

Acute Care Hospitals · Baltimore, MD

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210012

Location2401 West Belvedere AvenueBaltimore, MD 21215 · Baltimore City County

Emergency services Birthing friendly

Carroll Hospital Center

Acute Care Hospitals · Westminster, MD

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210033

Location200 Memorial AvenueWestminster, MD 21157 · Carroll County

Emergency services Birthing friendly

Northwest Hospital Center

Acute Care Hospitals · Randallstown, MD

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210040

Location5401 Old Court RoadRandallstown, MD 21133 · Baltimore County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21208 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.

84.79/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

69.7

Promoting Interoperability

100

Improvement Activities

Cost

79.62

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.

EDWARD ZIMMERMAN M.D.

Internal Medicine (Gastroenterology)

1838 GREENE TREE RD, STE 400
BALTIMORE, MD 21208

Baltimore County (410) 602-7782

KEN M ZONIES MD LLC

Internal Medicine

1838 GREENE TREE RD, STE 300
PIKESVILLE, MD 21208

Baltimore County (410) 653-0366

DR. NORBERT ZEMANKIEWICZ D.O.

Surgery

1838 GREENE TREE RD, SUITE 285
PIKESVILLE, MD 21208

Baltimore County (410) 602-0777

SHOSHANA COHEN O.D.

Optometrist

1838 GREENE TREE RD, SUITE 225
BALTIMORE, MD 21208

Baltimore County (410) 653-0200

MILAN WISTER M.D.

Internal Medicine

1838 GREENE TREE RD, SUITE 535
PIKESVILLE, MD 21208

Baltimore County (443) 438-4925

OROSZLAN LLC

Internal Medicine

1838 GREENE TREE RD, STE 300
PIKESVILLE, MD 21208

Baltimore County (410) 653-0366

CENTER FOR PAIN MANAGEMENT, LLC

Pain Medicine (Interventional Pain Medicine)

1838 GREENE TREE RD, SUITE 150
PIKESVILLE, MD 21208

Baltimore County (410) 383-7443

LIFEBRIDGE COMMUNITY GASTROENTEROLOGY, LLC

Internal Medicine (Gastroenterology)

1838 GREENE TREE RD, SUITE 400
PIKESVILLE, MD 21208

Baltimore County (410) 602-7782

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 Calvin Parker's NPI number?

The NPI number for Calvin Parker is 1073654976. It was assigned to this individual provider in the NPPES registry on February 12, 2007.

Where is Calvin Parker located?

Calvin Parker practices at 1838 Greene Tree Rd Suite 400, Baltimore, MD 21208. The listed phone number is (410) 602-7782.

What is Calvin Parker's specialty?

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

Is Calvin Parker enrolled in Medicare?

Yes. Calvin Parker is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Calvin Parker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Calvin Parker reassigns Medicare benefits to 2 organizations: Lifebridge Community Gastroenterology, LLC (Pikesville, MD) and Sinai Hospital Of Baltimore Inc (Owings Mills, 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 Calvin Parker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Calvin Parker affiliated with any hospitals?

According to CMS data, Calvin Parker is affiliated with Sinai Hospital Of Baltimore, Carroll Hospital Center and Northwest Hospital Center.

When was this NPI record last updated?

The NPPES record for Calvin Parker was last updated on March 9, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.