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DR. RONG ZHANG M.D.
NPI 1669421855
Internal Medicine in Baltimore, MD

Active since May 08, 2006PECOS EnrolledAccepts Medicare AssignmentCLIA 21D1007684 · Waiver
26.45/100
CMS Quality Rating
3333 N CALVERT ST STE 660, BALTIMORE, MD 21218(410) 261-8558(410) 261-8744 Get Directions Write a Review

NPPES record last updated: October 11, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Oct 11, 2025, Oct 13, 2023, Aug 23, 2021 and 1 more (4 updates tracked since 2018).

About Dr. Rong Zhang M.d. NPPES

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

DR. RONG ZHANG M.D. (NPI 1669421855) is an individual internal medicine provider in Baltimore, Maryland, licensed in Maryland (D0055059) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through May 12, 2028, and is affiliated with Medstar Union Memorial Hospital.

NPPES Registry Identity

NPI1669421855
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. RONG ZHANGCredential: M.D.
Location Address3333 N CALVERT ST STE 660Baltimore, MD 21218-6519
Mailing Address3333 N Calvert St Ste 660Baltimore, MD 21218-6519 · (410) 261-8558 · Fax (410) 261-8744
Phone(410) 261-8558
Fax(410) 261-8744
Sole ProprietorYes
Medical School CMSOtherGraduated 1982
Enumeration DateMay 8, 2006
Last NPPES UpdateOctober 11, 20254 updates tracked since enumeration
NPPES CertifiedOctober 11, 2025
✔ NPI 1669421855 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 · D0055059
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.
3333 N CALVERT ST STE 660, Baltimore, MD 21218
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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 and accepts Medicare assignment

Dr. Rong Zhang 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 ID8628046182
PECOS Enrollment IDI20040922000485
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 21D1007684

Rong Zhang MD Phd · Baltimore, MD
Active · expires May 12, 2028
CLIA Number21D1007684
Laboratory TypePhysician Office
Certificate Effective DateMay 13, 2026
Certificate Expiration DateMay 12, 2028
Laboratory DirectorRong Zhang
Laboratory Phone(410) 261-8558
Laboratory LocationRong Zhang MD Phd3333 N Calvert St Ste 660, Baltimore, MD 21218
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 6

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.
575 services187 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.
269 services114 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
77 services53 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
61 services61 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.
32 services28 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
26 services26 patients

Hospital Affiliations CMS Care Compare

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

Medstar Union Memorial Hospital

Acute Care Hospitals · Baltimore, MD
5/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number210024
Location201 East University ParkwayBaltimore, MD 21218 · Baltimore City County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21218 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.

26.45/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Individually scored
Quality0
Improvement Activities0
Cost88.16

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.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
13 suppliers38 claims99 services$4.97 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
8 suppliers16 claims24 services$0.84 avg. paid by Medicare
Transport chair, adult size, patient weight capacity up to and including 300 pounds E1038
DME-Other DME · category DE000N
1 supplier14 claims14 services$5.09 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
1 supplier12 claims12 services$179.04 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

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

RONG ZHANG M.D., PH.D. LLC
Clinic/Center (Multi-Specialty)
3333 N CALVERT ST STE 660
BALTIMORE, MD 21218
Baltimore City (410) 261-8558

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 Rong Zhang's NPI number?

The NPI number for Rong Zhang is 1669421855. It was assigned to this individual provider in the NPPES registry on May 8, 2006.

Where is Rong Zhang located?

Rong Zhang practices at 3333 N Calvert St Ste 660, Baltimore, MD 21218. The listed phone number is (410) 261-8558.

What is Rong Zhang's specialty?

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

Is Rong Zhang enrolled in Medicare?

Yes. Rong Zhang 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.

Does Rong Zhang hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 21D1007684) is associated with this NPI, valid through May 12, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

Is Rong Zhang affiliated with any hospitals?

According to CMS data, Rong Zhang is affiliated with Medstar Union Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Rong Zhang was last updated on October 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months 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.