GRAY R. WILLIAMS DPM
NPI 1750455028
Podiatrist in Vallejo, CA

NPI Status: Active since November 20, 2006

Contact Information

975 SERENO DR
VALLEJO, CA
ZIP 94589
Phone: (707) 651-1000

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  • Individual
  • Male
  • Years of Experience 31
  • Podiatrist
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About GRAY WILLIAMS

This page provides the complete NPI Profile along with additional information for Gray Williams, a provider established in Vallejo, California with a medical specialization in Podiatrist and more than 31 years of experience. He graduated from Barry University School Of Podiatric Medicine in 1995. The healthcare provider is registered in the NPI registry with number 1750455028 assigned on November 2006. The practitioner's primary taxonomy code is 213E00000X with license number E4081 (CA). The provider is registered as an individual and his NPI record was last updated 4 years ago.

NPI
1750455028
Provider Name
GRAY R. WILLIAMS DPM
Gender
Male
Entity Type
Individual
Location Address
975 SERENO DR VALLEJO, CA 94589
Location Phone
(707) 651-1000
Mailing Address
1800 HARRISON ST FL 7 OAKLAND, CA 94612
Mailing Phone
(510) 625-6262
Medical School Name
BARRY UNIVERSITY SCHOOL OF PODIATRIC MEDICINE
Graduation Year
1995
Is Sole Proprietor?
No
Enumeration Date
11-20-2006
Last Update Date
12-06-2021
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A podiatrist like Gray Williams provides medical and surgical care for people with foot, ankle, and lower leg issues. Podiatrists treat foot and ankle ailments like calluses, ingrown toenails, heel spurs, arthritis, congenital foot deformities, foot problems associated with diabetes and arch problems.

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Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Podiatrist

Taxonomy Code
213E00000X
Type
Podiatric Medicine & Surgery Service Providers
License No.
E4081
License State
CA
Taxonomy Description
A podiatrist is a person qualified by a Doctor of Podiatric Medicine (D.P.M.) degree, licensed by the state, and practicing within the scope of that license. Podiatrists diagnose and treat foot diseases and deformities. They perform medical, surgical and other operative procedures, prescribe corrective devices and prescribe and administer drugs and physical therapy.

Medicare Participation & PECOS Enrollment Status

Gray Williams is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Gray Williams is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME) and a Home Health Agency (HHA).

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 2860677184

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20110502000778

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: No

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $24.71 for a new patient copayment and $20.06 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 94589 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99203

  • Average New Patient Price $98.85
  • Minimum New Patient Price $65.02
  • Maximum New Patient Price $191.95
  • Average New Patient Copayment $24.71
  • Minimum New Patient Copayment $16.25
  • Maximum New Patient Copayment $47.98

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99213

  • Average Established Patient Price $80.24
  • Minimum Established Patient Price $21.86
  • Maximum Established Patient Price $157.69
  • Average Established Patient Copayment $20.06
  • Minimum Established Patient Copayment $5.46
  • Maximum Established Patient Copayment $39.42

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

Reviews for GRAY R. WILLIAMS DPM

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NPI Validation Check Digit Calculation


The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1750455028
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
27100851004
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 7 + 1 + 0 + 0 + 8 + 5 + 1 + 0 + 0 + 4 + 24 = 52
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
60 - 52 = 88

The NPI number 1750455028 is valid because the calculated check digit 8 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location


The following 20 providers are registered at the same or nearby location.

NPI Name / Type Taxonomy Address
1104898774DR. GEORGE A. BERNDT M.D.
Individual
Surgery975 SERENO DR
VALLEJO, CA 94589
(707) 651-3475
1194790972 DEAN M. GENES M.D.
Individual
Radiology (Diagnostic Radiology)975 SERENO DR
VALLEJO, CA 94589
(707) 651-1000
1881645075 VIKTOR NAIMAN M.D.
Individual
Radiology (Diagnostic Radiology)975 SERENO DR
VALLEJO, CA 94589
(707) 651-1315
1114960002 PETER P. CHAU MD
Individual
Emergency Medicine975 SERENO DR
VALLEJO, CA 94589
(707) 651-1000
1962438473 ALEKSANDER A ISAZADE M.D.
Individual
Family Medicine975 SERENO DR
VALLEJO, CA 94589
(707) 651-1025
1720015712 ALLEN JOSEPH MORINI D.O.
Individual
Emergency Medicine975 SERENO DR
VALLEJO, CA 94589
(707) 554-4444
1144326430 NAOMI ELAINE HARADA NURSE PRACTITIONER
Individual
Nurse Practitioner (Family)975 SERENO DR
VALLEJO, CA 94589
(707) 651-3470
1255430005 AYE KYU MD
Individual
Internal Medicine975 SERENO DR
VALLEJO, CA 94589
(707) 651-1000
1962502716MS. JANICE LEE BRIDGES NP CNM
Individual
Registered Nurse (Women's Health Care, Ambulatory)975 SERENO DR
VALLEJO, CA 94589
(707) 651-2930
1275633877MS. MICHELLE MAE MARIN A.N.P.
Individual
Nurse Practitioner (Adult Health)975 SERENO DR OFF HOURS CLINIC
VALLEJO, CA 94589
(707) 651-4270
1881795573 MARGARET MARY WAHL RN,
Individual
Nurse Practitioner (Gerontology)975 SERENO DR
VALLEJO, CA 94589
(707) 651-3976
1841391075MS. ELLEN B MCKNIGHT NP
Individual
Registered Nurse (Women's Health Care, Ambulatory)975 SERENO DR
VALLEJO, CA 94589
(707) 651-2000
1861593147MS. LINDA LEE BROKAW NURSE PRACTITIONER
Individual
Nurse Practitioner (Family)975 SERENO DR
VALLEJO, CA 94589
(707) 651-4220
1124110705DR. MIRA SURJANTO PHARM.D.
Individual
Pharmacist975 SERENO DR MOB MEDICINE 7
VALLEJO, CA 94589
(707) 651-2584
1396838710MRS. LAUREL VAWTER RN, MSN, FNP
Individual
Nurse Practitioner (Primary Care)975 SERENO DR
VALLEJO, CA 94589
(707) 651-2721
1083707798 ISABEL CHONG PHARM.D.
Individual
Pharmacist (Oncology)975 SERENO DR MEDICINE 6/ONCOLOGY
VALLEJO, CA 94589
(707) 651-5125
1679668990DR. PARYA SABERI PHARM.D.
Individual
Pharmacist975 SERENO DR
VALLEJO, CA 94589
(707) 651-2856
1801982483MRS. TINA LIANG PHARM.D.
Individual
Pharmacist975 SERENO DR INPATIENT PHARMACY
VALLEJO, CA 94589
(707) 640-2072
1801983150KAISER PERMANENTE VALLEJO
Organization
Clinic/Center (Ambulatory Family Planning Facility)975 SERENO DR
VALLEJO, CA 94589
(707) 651-2906
1659469518 NAM PHUOC THANH NGUYEN PHARM. D.
Individual
Pharmacist (Oncology)975 SERENO DR ONCOLOGY DEPARTMENT - MEDICINE 6
VALLEJO, CA 94589
(707) 651-2794

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1750455028, enumerated in the NPI registry as an "individual" on November 20, 2006

The provider is located at 975 Sereno Dr Vallejo, Ca 94589 and the phone number is (707) 651-1000

The provider's speciality is Podiatrist with taxonomy code 213E00000X

The provider has more than 31 years of experience. He graduated from Barry University School Of Podiatric Medicine in 1995.

Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME) and a Home Health Agency (HHA).

Medicare beneficiaries should expect a typical cost of $98.85 with an average copayment of $24.71 for new patient appointments. Established patients should expect a typical charge of $80.24 and an average copayment of 20.06. Please review your insurance plan or contact the provider directly to determine your specific costs.

This NPI record was last updated on November 20, 2006. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
NPI Profile data is regularly updated with the latest NPI registry information, if you would like to update or remove your NPI Profile in this website please contact us.