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DR. MELISSA J WILLIAMS M.D.
NPI 1205000122
Internal Medicine - Hematology & Oncology in Sacramento, CA

Active since April 22, 2008PECOS EnrolledAccepts Medicare Assignment
2800 L ST, SUITE 300, SACRAMENTO, CA 95816(916) 453-3300(916) 454-6822 Get Directions Write a Review

NPPES record last updated: July 29, 2015. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Melissa J Williams M.d. NPPES

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

DR. MELISSA J WILLIAMS M.D. (NPI 1205000122) is an individual hematology & oncology provider in Sacramento, California, licensed in California (A109254) and active in the NPI registry since April 2008. She is enrolled in Medicare PECOS and is a graduate of University Of Wisconsin School Of Medicine (2001).

NPPES Registry Identity

NPI1205000122
Entity TypeIndividualFemale
Primary Taxonomy207RH0003X
Provider Legal NameDR. MELISSA J WILLIAMSCredential: M.D.
Location Address2800 L ST, SUITE 300Sacramento, CA 95816-5616
Mailing Address10470 Old Placerville Rd, Suite 100Sacramento, CA 95827-2539 · (800) 470-0071
Phone(916) 453-3300
Fax(916) 454-6822
Sole ProprietorNo
Medical School CMSUniversity Of Wisconsin School Of MedicineGraduated 2001
Enumeration DateApril 22, 2008
Last NPPES UpdateJuly 29, 2015
✔ NPI 1205000122 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
Licenses✔ Licensed in CA · A109254✔ Licensed in PA · MD424950
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
2800 L ST, Sacramento, CA 95816
Open in Google Maps ↗

Other Identifiers 1

Medicare PINCJ764ZCA

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

Dr. Melissa J 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 ID7517038797
PECOS Enrollment IDI20091105000488
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 3

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.

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
736 services246 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
188 services138 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
37 services37 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95816 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
$180.85 typical visit price
range $60.44 – $180.85
Typical copayment $45.21 (range $15.11 – $45.21)
Most-billed visit code 99205
Established Patient
$105.95 typical visit price
range $19.88 – $148.15
Typical copayment $26.48 (range $4.97 – $37.03)
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.

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.

Capecitabine, oral, 500 mg J8521
Treatment-Treatment - Miscellaneous · category RX029N
5 suppliers14 claims994 services$0.65 avg. paid by Medicare
Breast prosthesis, mastectomy bra, without integrated breast prosthesis form, any size, any type L8000
DME-Orthotic Devices · category DF000N
3 suppliers19 claims50 services$35.54 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
3 suppliers12 claims13 services$12.66 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 20

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

HIEU HUYNH MD
Internal Medicine (Cardiovascular Disease)
2800 L ST, 6TH FLOOR
SACRAMENTO, CA 95816
Sacramento County (916) 887-4040
ERIKA WASSER LCSW
Social Worker (Clinical)
2800 L ST, SUITE 500
SACRAMENTO, CA 95816
Sacramento County (916) 454-6852
LORI AILEEN MITCHELL PHARM.D.
Pharmacist (Oncology)
2800 L ST, SUITE 445
SACRAMENTO, CA 95816
Sacramento County (916) 454-6969
EMILY YAO PA
Physician Assistant
2800 L ST
SACRAMENTO, CA 95816
Sacramento County (916) 316-5593
ROSEMARY A FORSTER PA
Physician Assistant (Surgical)
2800 L ST, #500
SACRAMENTO, CA 95816
Sacramento County (916) 454-6850
DR. NEELIMA G VALLURUPALLI M.D.
Internal Medicine (Cardiovascular Disease)
2800 L ST, 6TH FLOOR
SACRAMENTO, CA 95816
Sacramento County (916) 887-4040
RICHARD PRESLEY ATKINSON MD
Psychiatry & Neurology (Neurology)
2800 L ST, SUITE 500
SACRAMENTO, CA 95816
Sacramento County (916) 454-6850
HARVEY BRIAN WOLKOV MD
Radiology (Radiation Oncology)
2800 L ST
SACRAMENTO, CA 95816
Sacramento County (916) 454-6600

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 Melissa Williams's NPI number?

The NPI number for Melissa Williams is 1205000122. It was assigned to this individual provider in the NPPES registry on April 22, 2008.

Where is Melissa Williams located?

Melissa Williams practices at 2800 L St Suite 300, Sacramento, CA 95816. The listed phone number is (916) 453-3300.

What is Melissa Williams's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Melissa Williams enrolled in Medicare?

Yes. Melissa 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.

When was this NPI record last updated?

The NPPES record for Melissa Williams was last updated on July 29, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.