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DR. DAETWAN WILLIAMS M.D.
NPI 1215160932
Anesthesiology in Palo Alto, CA

Active since August 27, 2009PECOS EnrolledAccepts Medicare Assignment
795 EL CAMINO REAL, PALO ALTO, CA 94040(650) 853-2894 Get Directions Write a Review

NPPES record last updated: May 29, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 29, 2020, Dec 29, 2015 (2 updates tracked since 2015).

About Dr. Daetwan Williams M.d. NPPES

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

DR. DAETWAN WILLIAMS M.D. (NPI 1215160932) is an individual anesthesiology provider in Palo Alto, California, licensed in California (A115394) and active in the NPI registry since August 2009. He is enrolled in Medicare PECOS and is a graduate of University Of Louisville School Of Medicine (2006).

NPPES Registry Identity

NPI1215160932
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. DAETWAN WILLIAMSCredential: M.D.
Location Address795 EL CAMINO REALPalo Alto, CA 94040-6203
Mailing Address325 Distel CirLos Altos, CA 94022-1408 · (650) 853-2894
Phone(650) 853-2894
Sole ProprietorNo
Medical School CMSUniversity Of Louisville School Of MedicineGraduated 2006
Enumeration DateAugust 27, 2009
Last NPPES UpdateMay 29, 20202 updates tracked since enumeration
NPPES CertifiedMay 29, 2020
✔ NPI 1215160932 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
Licenses✔ Licensed in CA · A115394✔ Licensed in NY · 247142
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.
795 EL CAMINO REAL, Palo Alto, CA 94040
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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

Dr. Daetwan Williams 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 ID3274711304
PECOS Enrollment IDI20110620000699
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 Daetwan Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sutter Bay Medical Foundation
Same address
Multi-Specialty
795 EL CAMINO REAL
Palo Alto, CA 94301
NPI 1013950807 (650) 321-4121

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.

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.
101 services99 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.
95 services93 patients
Insertion of probe in esophagus for heart ultrasound 93313
This procedure involves placing a small probe in your esophagus. The probe, connected to an ultrasound machine, helps capture detailed images of your heart. This non-surgical, minimally invasive procedure provides valuable information about your heart's structure and function.
80 services78 patients
Insertion of non-tunneled central venous tube for infusion (5 years or older) 36556
This procedure involves placing a thin tube into a large vein, usually in the neck or chest, to administer medication or fluids. It's done under local anesthesia to minimize discomfort. It's a standard, safe procedure for individuals aged 5 and above.
26 services26 patients
Anesthesia for x-ray on arteries 01924
Anesthesia for x-ray on arteries is a procedure to ensure comfort during imaging tests. A medicine is given to make you relaxed or sleep, minimizing any discomfort. It's typically used for invasive procedures to examine arteries for blockages or other issues.
15 services15 patients
Ultrasound of heart with probe in esophagus, with report 93312
This procedure, called a transesophageal echocardiogram, uses a small probe passed into your esophagus to capture detailed images of your heart. The report provides information about your heart's structure and function.
15 services15 patients

Other Providers at the Same Location NPPES 3

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

SHANTHALA KESHAVACHARYA M.D.
Anesthesiology
795 EL CAMINO REAL
PALO ALTO, CA 94040
Santa Clara County (650) 853-2894
DR. DAVID LAMIA PARRIS M.D
Anesthesiology
795 EL CAMINO REAL
PALO ALTO, CA 94040
Santa Clara County (650) 853-2894
YINCHONG ERICA MAK MD
Internal Medicine
795 EL CAMINO REAL
PALO ALTO, CA 94040
Santa Clara County (650) 321-4121

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 Daetwan Williams's NPI number?

The NPI number for Daetwan Williams is 1215160932. It was assigned to this individual provider in the NPPES registry on August 27, 2009.

Where is Daetwan Williams located?

Daetwan Williams practices at 795 El Camino Real, Palo Alto, CA 94040. The listed phone number is (650) 853-2894.

What is Daetwan Williams's specialty?

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

Is Daetwan Williams enrolled in Medicare?

Yes. Daetwan Williams 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 Daetwan Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Daetwan Williams reassigns Medicare benefits to Sutter Bay Medical Foundation (Palo Alto, CA). 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 Daetwan Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Daetwan Williams was last updated on May 29, 2020. 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.