1. Home
  2. Directory
  3. Washington
  4. Tacoma
  5. Anesthesiology
  6. NPI Profile

NATHANIEL ERIC SIEV MD
NPI 1023515269
Anesthesiology in Tacoma, WA

Active since April 12, 2018PECOS EnrolledAccepts Medicare Assignment
93.09/100
CMS Quality Rating

NPPES record last updated: December 30, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Dec 30, 2025, May 4, 2018, Apr 12, 2018 (3 updates tracked since 2018).

About Nathaniel Eric Siev Md NPPES

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

NATHANIEL ERIC SIEV MD (NPI 1023515269) is an individual anesthesiology provider in Tacoma, Washington, licensed in Washington (MD61218481) and active in the NPI registry since April 2018. He is enrolled in Medicare PECOS, is affiliated with St Joseph Medical Center, and maintains a secondary practice location in Seattle.

NPPES Registry Identity

NPI1023515269
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameNATHANIEL ERIC SIEVCredential: MD
Location Address1717 S J STTacoma, WA 98405-4933
Mailing Address1717 S J StTacoma, WA 98405-4933 · (253) 426-6341 · Fax (253) 426-6344
Phone(253) 426-4101
Sole ProprietorNo
Medical School CMSOtherGraduated 2018
Enumeration DateApril 12, 2018
Last NPPES UpdateDecember 30, 20253 updates tracked since enumeration
NPPES CertifiedDecember 30, 2025
✔ NPI 1023515269 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in WA · MD61218481
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.
1717 S J ST, Tacoma, WA 98405
Open in Google Maps ↗

Secondary Practice Location 1

Location 11100 9th AveSeattle, WA 98101-2756 · Phone (206) 223-6600 · Fax (206) 223-6982

Other Identifiers 1

Medicaid2205683WA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Premera Blue Cross Blue Shield of Alaska.Insurance ›

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

Nathaniel Eric Siev Md 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 ID6002154978
PECOS Enrollment IDI20220623000973
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.

Areas of Expertise CMS Part B claims

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.

Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope 00731
This procedure involves the use of an endoscope, a flexible tube with a light and camera, to examine your esophagus, stomach, or upper small bowel. Anesthesia ensures you are comfortable and pain-free during the procedure.
26 services25 patients

Hospital Affiliations CMS Care Compare

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

St Joseph Medical Center

Acute Care Hospitals · Tacoma, WA
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number500108
Location1717 South J StreetTacoma, WA 98405 · Pierce 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.

93.09/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality73.95
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.

ELIZABETH CULP
Registered Nurse
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 426-6163
GLAUCIA DE CASTRO MOREIRA M.D.
Anesthesiology
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 426-6625
GRANT ALEXANDER YELLIOTT II PA C
Physician Assistant
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 426-6660
MS. JESSICA WAI-YING TAM MD
Internal Medicine
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 426-6341
KARA SPRINGER CRANE PHARMD
Pharmacist
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 432-8216
BROOKE ELIZABETH CLOVER-OWENS RN
Registered Nurse (Obstetric, Inpatient)
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 426-4101
PRISCILLA RUTH JAMES AGACNP-BC
Nurse Practitioner (Gerontology)
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 426-6341
ANNA ZAGORULKO ARNP
Nurse Practitioner (Family)
1717 S J ST
TACOMA, WA 98405
Pierce County (253) 426-4101

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 Nathaniel Siev's NPI number?

The NPI number for Nathaniel Siev is 1023515269. It was assigned to this individual provider in the NPPES registry on April 12, 2018.

Where is Nathaniel Siev located?

Nathaniel Siev practices at 1717 S J St, Tacoma, WA 98405. The listed phone number is (253) 426-4101.

What is Nathaniel Siev's specialty?

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

Is Nathaniel Siev enrolled in Medicare?

Yes. Nathaniel Siev 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.

What insurance does Nathaniel Siev accept?

Health plans from Premera Blue Cross Blue Shield of Alaska list Nathaniel Siev as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Nathaniel Siev affiliated with any hospitals?

According to CMS data, Nathaniel Siev is affiliated with St Joseph Medical Center.

When was this NPI record last updated?

The NPPES record for Nathaniel Siev was last updated on December 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.