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DR. STEPHEN MARTIN SOZIO M.D., M.H.S.
NPI 1558412288
Internal Medicine - Nephrology in Baltimore, MD

Active since January 16, 2007PECOS Enrolled
75/100
CMS Quality Rating
301 MASON LORD DR STE 2500, JOHNS HOPKINS BAYVIEW RENAL MEDICINE, BALTIMORE, MD 21224(410) 550-2820(410) 550-7950 Get Directions Write a Review

NPPES record last updated: January 5, 2013. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Stephen Martin Sozio M.d., M.h.s. NPPES

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

DR. STEPHEN MARTIN SOZIO M.D., M.H.S. (NPI 1558412288) is an individual nephrology provider in Baltimore, Maryland, licensed in Maryland (D0067840) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Hospital, The, and is a graduate of Johns Hopkins University School Of Medicine (2002).

NPPES Registry Identity

NPI1558412288
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameDR. STEPHEN MARTIN SOZIOCredential: M.D., M.H.S.
Location Address301 MASON LORD DR STE 2500, JOHNS HOPKINS BAYVIEW RENAL MEDICINEBaltimore, MD 21224-3057
Mailing AddressPo Box 64264Baltimore, MD 21264-4264
Phone(410) 550-2820
Fax(410) 550-7950
Sole ProprietorYes
Medical School CMSJohns Hopkins University School Of MedicineGraduated 2002
Enumeration DateJanuary 16, 2007
Last NPPES UpdateJanuary 5, 2013
✔ NPI 1558412288 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in MD · D0067840
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
301 MASON LORD DR STE 2500, Baltimore, MD 21224
Open in Google Maps ↗

Other Identifiers 2

Medicare PIN159541ZABUMD
Medicaid023689600MD

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Stephen Martin Sozio M.d., M.h.s. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID9830243047
PECOS Enrollment IDI20090821000206
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 Stephen Sozio 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
0.1 mi
Clinical Medical Laboratory
5501 HOPKINS BAYVIEW CIR, ROOM 1A20
Baltimore, MD 21224
  • Reassigned Medicare billing, Maryland enrollment
  • 4,483 clinicians in this Medicare group
NPI 1306810619 (410) 550-3362
Johns Hopkins University
2.3 mi
Hospitalist
600 N WOLFE ST
Baltimore, MD 21287
  • Reassigned Medicare billing, Maryland enrollment
  • 338 clinicians in this Medicare group
NPI 1902332133 (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 9

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 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.
275 services163 patients
Dialysis procedure including 1 evaluation 90945
Dialysis is a treatment that filters and purifies the blood when your kidneys can't do their job. The procedure involves circulating your blood through a machine that removes waste products. An evaluation is done beforehand to assess your health and determine the best approach for your treatment.
130 services42 patients
Dialysis services, 4 or more physician visits per month (20 years or older) 90960
Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.
123 services16 patients
Hemodialysis procedure with physician evaluation 90935
Hemodialysis is a treatment that uses a machine to filter waste and excess fluid from your blood when your kidneys can't. A physician checks your health before, during, and after the procedure to ensure it's working effectively for you.
121 services83 patients
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.
104 services65 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.
68 services68 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 21224 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.

75/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Individually scored

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.

Tacrolimus, extended release, (envarsus xr), oral, 0.25 mg J7503
Treatment-Chemotherapy · category RH002N
1 supplier22 claims9,360 services$1.22 avg. paid by Medicare
Sirolimus, oral, 1 mg J7520
Treatment-Treatment - Miscellaneous · category RX029N
1 supplier12 claims180 services$2.47 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
2 suppliers26 claims26 services$12.15 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.

CHIRAG R PARIKH MD
Internal Medicine (Nephrology)
301 MASON LORD DR STE 2500
BALTIMORE, MD 21224
Baltimore City (410) 550-2820

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 Stephen Sozio's NPI number?

The NPI number for Stephen Sozio is 1558412288. It was assigned to this individual provider in the NPPES registry on January 16, 2007.

Where is Stephen Sozio located?

Stephen Sozio practices at 301 Mason Lord Dr Ste 2500 Johns Hopkins Bayview Renal Medicine, Baltimore, MD 21224. The listed phone number is (410) 550-2820.

What is Stephen Sozio's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Stephen Sozio enrolled in Medicare?

Yes. Stephen Sozio is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Stephen Sozio's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Sozio 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 Stephen Sozio's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Stephen Sozio affiliated with any hospitals?

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

When was this NPI record last updated?

The NPPES record for Stephen Sozio was last updated on January 5, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.