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HAZEL KATHERINE WERLHOF M.D.
NPI 1215236773
Anesthesiology in Philadelphia, PA

Active since March 23, 2011PECOS EnrolledAccepts Medicare Assignment
85.48/100
CMS Quality Rating
3400 CIVIC CENTER BLVD, PHILADELPHIA, PA 19104(215) 349-8310(215) 662-2739 Get Directions Write a Review

NPPES record last updated: October 24, 2019. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Hazel Katherine Werlhof M.d. NPPES

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

HAZEL KATHERINE WERLHOF M.D. (NPI 1215236773) is an individual anesthesiology provider in Philadelphia, Pennsylvania, licensed in Pennsylvania (MD454348) and active in the NPI registry since March 2011. She is enrolled in Medicare PECOS, is affiliated with Hospital Of Univ Of Pennsylvania, and is a graduate of George Washington University School Of Medicine (2011).

NPPES Registry Identity

NPI1215236773
Entity TypeIndividualFemale
Primary Taxonomy207L00000X
Provider Legal NameHAZEL KATHERINE WERLHOFCredential: M.D.
Location Address3400 CIVIC CENTER BLVDPhiladelphia, PA 19104-5127
Mailing Address3400 Civic Center BlvdPhiladelphia, PA 19104-5127 · (215) 349-8310 · Fax (215) 662-2739
Phone(215) 349-8310
Fax(215) 662-2739
Sole ProprietorNo
Medical School CMSGeorge Washington University School Of MedicineGraduated 2011
Enumeration DateMarch 23, 2011
Last NPPES UpdateOctober 24, 2019
✔ NPI 1215236773 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in PA · MD454348
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
Also ListedAnesthesiology · Critical Care MedicineTaxonomy 207LC0200X · License MD454348 (PA)
3400 CIVIC CENTER BLVD, Philadelphia, PA 19104
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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 and accepts Medicare assignment

Hazel Katherine Werlhof 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 ID1557650058
PECOS Enrollment IDI20160524000599
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 Hazel Werlhof reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Of Penn-Medical Group
Same address
Surgery
3400 CIVIC CENTER BLVD, 4 WEST PAVILLION
Philadelphia, PA 19104
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 3,488 clinicians in this Medicare group
NPI 1033507157 (215) 662-2626

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 8

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.
133 services49 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.
38 services25 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.
27 services17 patients
Insertion of artery tube for blood sampling or infusion through skin 36620
This procedure involves placing a small tube into an artery, usually in the wrist or elbow, to collect blood samples or administer medication. It's done under local anesthesia and is a common, safe practice.
18 services18 patients
Anesthesia for procedure to assess heart electrical activity 00537
Anesthesia for a procedure to assess heart electrical activity helps ensure comfort and relaxation. It involves administering medication that either numbs a specific area or makes you sleep temporarily. This allows doctors to safely examine your heart's electrical signals without causing discomfort.
15 services15 patients
Anesthesia for procedure for total knee joint replacement 01402
Anesthesia for a total knee joint replacement numbs your body to eliminate pain during surgery. This could be general anesthesia where you're unconscious, or regional anesthesia where only the leg is numb. It's administered by a specialist, ensuring safety and comfort.
15 services15 patients

Hospital Affiliations CMS Care Compare 3

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

Hospital Of Univ Of Pennsylvania

Acute Care Hospitals · Philadelphia, PA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390111
Location34th & Spruce StsPhiladelphia, PA 19104 · Philadelphia County
Emergency services Birthing friendly

Chester County Hospital

Acute Care Hospitals · West Chester, PA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390179
Location701 East Marshall StreetWest Chester, PA 19380 · Chester County
Emergency services Birthing friendly

Penn Presbyterian Medical Center

Acute Care Hospitals · Philadelphia, PA
5/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number390223
Location51 North 39th StreetPhiladelphia, PA 19104 · Philadelphia County
Emergency services

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.

85.48/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality73.6
Promoting Interoperability100
Improvement Activities40

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.

PHILIPPE OLIVIER SZAPARY MD
Internal Medicine (Cardiovascular Disease)
3400 CIVIC CENTER BLVD, EAST PAVILION, 2ND FLOOR
PHILADELPHIA, PA 19104
Philadelphia County (215) 615-4949
UNIVERSITY OF PENNSYLVANIA
Psychiatric Unit
3400 CIVIC CENTER BLVD, 2 SOUTH PAVILION
PHILADELPHIA, PA 19104
Philadelphia County (215) 614-1828
CAREY MCDOUGALL M.S.
Genetic Counselor, MS
3400 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-2920
KELSEY ELIZABETH SPIELMAN
Genetic Counselor, MS
3400 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 349-8479
STEVEN S SCHERER MD
Psychiatry & Neurology (Neurology)
3400 CIVIC CENTER BLVD, 2ND FLOOR, SOUTH PAVILION
PHILADELPHIA, PA 19104
Philadelphia County (215) 662-3606
KEITH CENGEL MD, PHD
Radiology (Radiation Oncology)
3400 CIVIC CENTER BLVD, CONCOURSE LEVEL
PHILADELPHIA, PA 19104
Philadelphia County (215) 662-2428
BRIAN FRIEL MD
Urology
3400 CIVIC CENTER BLVD, UROLOGY, PERELMAN CENTER, 3RD FLOOR, WEST PAVILION
PHILADELPHIA, PA 19104
Philadelphia County (215) 349-5042
RICHARD KRISKA
Pharmacist
3400 CIVIC CENTER BLVD, ROOM 101 WEST
PHILADELPHIA, PA 19104
Philadelphia County (215) 662-6260

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 Hazel Werlhof's NPI number?

The NPI number for Hazel Werlhof is 1215236773. It was assigned to this individual provider in the NPPES registry on March 23, 2011.

Where is Hazel Werlhof located?

Hazel Werlhof practices at 3400 Civic Center Blvd, Philadelphia, PA 19104. The listed phone number is (215) 349-8310.

What is Hazel Werlhof's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Hazel Werlhof enrolled in Medicare?

Yes. Hazel Werlhof 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.

Which organization bills Medicare for Hazel Werlhof's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hazel Werlhof reassigns Medicare benefits to University Of Penn-Medical Group (Philadelphia, PA). 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 Hazel Werlhof's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Hazel Werlhof affiliated with any hospitals?

According to CMS data, Hazel Werlhof is affiliated with Hospital Of Univ Of Pennsylvania, Chester County Hospital and Penn Presbyterian Medical Center.

When was this NPI record last updated?

The NPPES record for Hazel Werlhof was last updated on October 24, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.