1. Home
  2. Directory
  3. Maryland
  4. Baltimore
  5. Anesthesiology
  6. NPI Profile

SINEAD NYHAN MD
NPI 1558704064
Anesthesiology - Critical Care Medicine in Baltimore, MD

Active since April 15, 2013PECOS Enrolled
74.39/100
CMS Quality Rating
1800 ORLEANS ST # 9127, BALTIMORE, MD 21287(443) 287-3981(410) 955-9062 Get Directions Write a Review

NPPES record last updated: April 10, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 10, 2023, Jan 10, 2020 (2 updates tracked since 2020).

About Sinead Nyhan Md NPPES

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

SINEAD NYHAN MD (NPI 1558704064) is an individual critical care medicine provider in Baltimore, Maryland, licensed in Maryland (D83028) and active in the NPI registry since April 2013. She is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Hospital, The, and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (2013).

NPPES Registry Identity

NPI1558704064
Entity TypeIndividualFemale
Primary Taxonomy207LC0200X
Provider Legal NameSINEAD NYHANCredential: MD
Location Address1800 ORLEANS ST # 9127Baltimore, MD 21287-0010
Mailing Address6201 Greenleigh AveMiddle River, MD 21220-2004 · (410) 933-6423 · Fax (410) 500-4266
Phone(443) 287-3981
Fax(410) 955-9062
Sole ProprietorNo
Medical School CMSLoyola University Of Chicago, Stritch School Of MedicineGraduated 2013
Enumeration DateApril 15, 2013
Last NPPES UpdateApril 10, 20232 updates tracked since enumeration
NPPES CertifiedApril 10, 2023
✔ NPI 1558704064 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiology · Critical Care MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207LC0200X
License✔ Licensed in MD · D83028
Definition
An anesthesiologist, who specializes in critical care medicine diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.
1800 ORLEANS ST # 9127, Baltimore, MD 21287
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Sinead Nyhan Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID3072880590
PECOS Enrollment IDI20190802000244
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 Reassignment

Medicare enrollment records show Sinead Nyhan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Johns Hopkins University
0.1 mi
Critical Care Medicine
600 N WOLFE ST
Baltimore, MD 21287
  • Reassigned Medicare billing, Maryland enrollment
  • 4,483 clinicians in this Medicare group
NPI 1881694453 (410) 933-5474

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 4

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.

Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
221 services74 patients
Critical care, each additional 30 minutes 99292
Critical care refers to special attention given to patients facing life-threatening conditions. Each additional 30 minutes indicates the extension of this specialized care. This might include close monitoring, medication adjustments, and immediate interventions as needed.
89 services32 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.
21 services16 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.
14 services14 patients

Hospital Affiliations CMS Care Compare

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

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.

74.39/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality64.71
Promoting Interoperability97
Improvement Activities40
Cost52.43

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 Sinead Nyhan's NPI number?

The NPI number for Sinead Nyhan is 1558704064. It was assigned to this individual provider in the NPPES registry on April 15, 2013.

Where is Sinead Nyhan located?

Sinead Nyhan practices at 1800 Orleans St # 9127, Baltimore, MD 21287. The listed phone number is (443) 287-3981.

What is Sinead Nyhan's specialty?

The primary specialty registered for this NPI is Anesthesiology, specializing in Critical Care Medicine, with taxonomy code 207LC0200X.

Is Sinead Nyhan enrolled in Medicare?

Yes. Sinead Nyhan is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Sinead Nyhan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sinead Nyhan reassigns Medicare benefits to Johns Hopkins University (Baltimore, MD). The 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 Sinead Nyhan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Sinead Nyhan affiliated with any hospitals?

According to CMS data, Sinead Nyhan is affiliated with Johns Hopkins Hospital, The.

When was this NPI record last updated?

The NPPES record for Sinead Nyhan was last updated on April 10, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.