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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

WILLIAM DAVIS MCCONNELL MD
NPI 1548215205
Internal Medicine in Baltimore, MD

Active since May 23, 2006PECOS EnrolledCLIA 21D0676436 · Waiver
10.45/100
CMS Quality Rating
6301 N CHARLES ST, BALTIMORE, MD 21212(410) 372-0300(410) 372-0304 Get Directions Write a Review

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

About William Davis Mcconnell Md NPPES

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

WILLIAM DAVIS MCCONNELL MD (NPI 1548215205) is an individual internal medicine provider in Baltimore, Maryland, licensed in Maryland (D42129) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through November 21, 2027, and is affiliated with Greater Baltimore Medical Center.

NPPES Registry Identity

NPI1548215205
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameWILLIAM DAVIS MCCONNELLCredential: MD
Location Address6301 N CHARLES STBaltimore, MD 21212
Mailing Address6141 Barroll RdBaltimore, MD 21209 · (410) 296-7646 · Fax (410) 296-0844
Phone(410) 372-0300
Fax(410) 372-0304
Sole ProprietorNo
Medical School CMSVanderbilt University School Of MedicineGraduated 1982
Enumeration DateMay 23, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1548215205 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MD · D42129
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.
6301 N CHARLES ST, Baltimore, MD 21212
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Davis Mcconnell Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID3971498908
PECOS Enrollment IDI20040218000915
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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 21D0676436

William D Mcconnell MD · Baltimore, MD
Active · expires Nov 21, 2027
CLIA Number21D0676436
Laboratory TypePhysician Office
Certificate Effective DateNovember 22, 2025
Certificate Expiration DateNovember 21, 2027
Laboratory DirectorWilliam D. Mcconnell MD
Laboratory Phone(410) 372-0300
Laboratory LocationWilliam D Mcconnell MD6301 N Charles St Suite 5, Baltimore, MD 21212
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 19

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.

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.
590 services246 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
465 services265 patients
Urinalysis, manual test 81002
A urinalysis is a simple, non-invasive test that checks the urine for various elements such as sugar, protein, and signs of infection. It can help detect many common conditions, including kidney disease and diabetes. The manual test involves a lab technician examining a urine sample.
274 services239 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.
273 services241 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000
An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.
215 services198 patients
Annual depression screening, 5 to 15 minutes G0444
An annual depression screening is a short, routine evaluation to check for signs of depression. It involves answering a series of questions about your feelings, thoughts, and behaviors. The process takes about 15 minutes and helps detect depression early for better management.
210 services210 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 21212 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.

10.45/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Individually scored
Quality0
Improvement Activities0
Cost34.83

Reported Quality Measures

Breast Cancer Screening
Percentage of women 50-74 years of age who had a mammogram to screen for breast cancer
80%99 patients4/55-star benchmark: 92%
Colorectal Cancer Screening
Percentage of adults 50-75 years of age who had appropriate screening for colorectal cancer
88%234 patients5/55-star benchmark: 85%
e-Prescribing
At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.
85%1,926 patients4/55-star benchmark: 100%
Medication Reconciliation
The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.
97%36 patients4/55-star benchmark: 100%
Patient-Specific Education
The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.
97%532 patients4/55-star benchmark: 100%
Preventive Care and Screening: Influenza Immunization
Percentage of patients aged 6 months and older seen for a visit between October 1 and March 31 who received an influenza immunization OR who reported previous receipt of an influenza immunization
83%356 patients4/55-star benchmark: 88%
Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention
Percentage of patients aged 18 years and older who were screened for tobacco use one or more times within 24 months AND who received tobacco cessation intervention if identified as a tobacco user
Patients tobacco: 96% · 393 patients
96%393 patients
Provide Patient Access
At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…
77%532 patients4/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 3

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
7 suppliers23 claims53 services$5.57 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
4 suppliers37 claims37 services$67.99 avg. paid by Medicare
Portable oxygen concentrator, rental E1392
DME-Oxygen and Supplies · category DC002N
3 suppliers26 claims26 services$33.58 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 6

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

DR. KAREN QUICK ANDERSON D.D.S.
Dentist (General Practice)
6301 N CHARLES ST, SUITE 7
BALTIMORE, MD 21212
Baltimore City (410) 377-0677
DR. ROBERT LESLIE LITTMAN M.D.
Psychiatry & Neurology (Child & Adolescent Psychiatry)
6301 N CHARLES ST, STE 8
BALTIMORE, MD 21212
Baltimore City (410) 377-6370
MS. LESLIE MARCIA KROHN LCSWC
Social Worker (Clinical)
6301 N CHARLES ST, SUITE 8
BALTIMORE, MD 21212
Baltimore City (410) 377-6370
RONALD T. CARTER, DDS PA
Dentist (General Practice)
6301 N CHARLES ST, SUITE 7
BALTIMORE, MD 21212
Baltimore City (410) 377-3104
MS. AMY LYNN KOPEL LCSW-C
Social Worker (Clinical)
6301 N CHARLES ST, SUITE 8
BALTIMORE, MD 21212
Baltimore City (410) 377-6370
DR. IREDELL WADDELL IGLEHART III M.D.
Internal Medicine
6301 N CHARLES ST, SUITE 5
BALTIMORE, MD 21212
Baltimore City (410) 372-0300

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 William Mcconnell's NPI number?

The NPI number for William Mcconnell is 1548215205. It was assigned to this individual provider in the NPPES registry on May 23, 2006.

Where is William Mcconnell located?

William Mcconnell practices at 6301 N Charles St, Baltimore, MD 21212. The listed phone number is (410) 372-0300.

What is William Mcconnell's specialty?

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

Is William Mcconnell enrolled in Medicare?

Yes. William Mcconnell is registered in the Medicare PECOS enrollment system.

Does William Mcconnell hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 21D0676436) is associated with this NPI, valid through November 21, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

Is William Mcconnell affiliated with any hospitals?

According to CMS data, William Mcconnell is affiliated with Greater Baltimore Medical Center.

When was this NPI record last updated?

The NPPES record for William Mcconnell was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 37 days 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.