1. Home
  2. Directory
  3. Rhode Island
  4. Providence
  5. Internal Medicine
  6. NPI Profile

WILLIAM M OLDHAM MD, PHD
NPI 1518126945
Internal Medicine - Pulmonary Disease in Providence, RI

Active since June 02, 2008PECOS EnrolledAccepts Medicare Assignment
593 EDDY ST, PROVIDENCE, RI 02903(401) 444-3565(401) 444-5493 Get Directions Write a Review

NPPES record last updated: April 15, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About William M Oldham Md, Phd NPPES

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

WILLIAM M OLDHAM MD, PHD (NPI 1518126945) is an individual pulmonary disease provider in Providence, Rhode Island, licensed in Rhode Island (MD20598) and active in the NPI registry since June 2008. He is enrolled in Medicare PECOS, is affiliated with Rhode Island Hospital, and maintains a secondary practice location in Boston.

NPPES Registry Identity

NPI1518126945
Entity TypeIndividualMale
Primary Taxonomy207RP1001X
Provider Legal NameWILLIAM M OLDHAMCredential: MD, PHD
Location Address593 EDDY STProvidence, RI 02903-4923
Mailing AddressDept 3010, Po Box 986524Boston, MA 02298-6524 · (833) 924-5546
Phone(401) 444-3565
Fax(401) 444-5493
Sole ProprietorNo
Medical School CMSVanderbilt University School Of MedicineGraduated 2008
Enumeration DateJune 2, 2008
Last NPPES UpdateApril 15, 2025
NPPES CertifiedApril 15, 2025
✔ NPI 1518126945 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
Licenses✔ Licensed in RI · MD20598✔ Licensed in MA · 242571
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
Also ListedInternal MedicineTaxonomy 207R00000X · License L-236013 (MA)
Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License MD20598 (RI)
593 EDDY ST, Providence, RI 02903
Open in Google Maps ↗

Secondary Practice Location 1

Location 175 Francis StBoston, MA 02115-6110 · Phone (617) 732-7420

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Taro Health.Insurance ›

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

William M Oldham Md, Phd 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 ID4486830221
PECOS Enrollment IDI20250416002336
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 Reassignments

6

Medicare enrollment records show William Oldham reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Lifespan Physician Group, Inc.
Same address
General Practice
593 EDDY ST
Providence, RI 02903
  • Reassigned Medicare billing, Rhode Island enrollment
  • 1,372 clinicians in this Medicare group
NPI 1407116643 (401) 444-6779
Rhode Island Hospital
Same address
Multi-Specialty
593 EDDY ST
Providence, RI 02903
  • Reassigned Medicare billing, Rhode Island enrollment
  • 358 clinicians in this Medicare group
NPI 1154537520 (401) 444-6905
Brown Medicine
0.2 mi
Gastroenterology
235 PLAIN ST STE 201
Providence, RI 02905
  • Reassigned Medicare billing, Rhode Island enrollment
  • 256 clinicians in this Medicare group
NPI 1730827767 (401) 861-8830
The Miriam Hospital
2.8 mi
General Acute Care Hospital
164 SUMMIT AVE
Providence, RI 02906
  • Reassigned Medicare billing, Rhode Island enrollment
  • 47 clinicians in this Medicare group
NPI 1770520462 (401) 793-2500
Mass General Brigham Medical Group Suburban Massachusetts Inc
37 mi
Family Medicine
2014 WASHINGTON STREET
Newton, MA 02462
  • Reassigned Medicare billing, Massachusetts enrollment
  • 992 clinicians in this Medicare group
NPI 1538191218 (617) 243-6262
Brigham & Womens Physicians Organization Inc
39 mi
Internal Medicine
75 FRANCIS ST
Boston, MA 02115
  • Reassigned Medicare billing, Massachusetts enrollment
  • 4,574 clinicians in this Medicare group
NPI 1033535497 (617) 732-5500

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 5

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.
38 services22 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.
34 services19 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.
19 services17 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
16 services15 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.
12 services12 patients

Hospital Affiliations CMS Care Compare 2

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

Rhode Island Hospital

Acute Care Hospitals · Providence, RI
3/5 CMS rating
OwnershipTribal
CMS Certification Number410007
Location593 Eddy StreetProvidence, RI 02903 · Providence County
Emergency services

The Miriam Hospital

Acute Care Hospitals · Providence, RI
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number410012
Location164 Summit AvenueProvidence, RI 02906 · Providence County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02903 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
$134.17 typical visit price
range $58.57 – $177.03
Typical copayment $33.54 (range $14.64 – $44.25)
Most-billed visit code 99204
Established Patient
$103.10 typical visit price
range $18.92 – $144.38
Typical copayment $25.77 (range $4.73 – $36.09)
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.

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.

DR. KEITH-AUSTIN SCARFO D.O.
Anesthesiology
593 EDDY ST, APC 6
PROVIDENCE, RI 02903
Providence County (401) 444-3777
AILEEN HSUEH
Surgery
593 EDDY ST
PROVIDENCE, RI 02903
Providence County (401) 444-8450
RHODE ISLAND HOSPITAL
General Acute Care Hospital
593 EDDY ST, MAIN 4
PROVIDENCE, RI 02903
Providence County (401) 444-7585
DR. GA HIE NAM M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
593 EDDY ST
PROVIDENCE, RI 02903
Providence County (401) 444-5057
EUGENIE ATALLAH
Psychiatry & Neurology (Neurology)
593 EDDY ST
PROVIDENCE, RI 02903
Providence County (401) 606-2645
BRET CAULFIELD
Physician Assistant
593 EDDY ST
PROVIDENCE, RI 02903
Providence County (401) 444-4000
JUNG HO GONG
Student in an Organized Health Care Education/Training Program
593 EDDY ST
PROVIDENCE, RI 02903
Providence County (401) 793-2695
FANNY HUANG MD
Student in an Organized Health Care Education/Training Program
593 EDDY ST
PROVIDENCE, RI 02903
Providence County (401) 444-4741

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 William Oldham's NPI number?

The NPI number for William Oldham is 1518126945. It was assigned to this individual provider in the NPPES registry on June 2, 2008.

Where is William Oldham located?

William Oldham practices at 593 Eddy St, Providence, RI 02903. The listed phone number is (401) 444-3565.

What is William Oldham's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is William Oldham enrolled in Medicare?

Yes. William Oldham 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 organizations bill Medicare for William Oldham's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Oldham reassigns Medicare benefits to 6 organizations: Lifespan Physician Group, Inc. (Providence, RI), Rhode Island Hospital (Providence, RI), Brown Medicine (Providence, RI), The Miriam Hospital (Providence, RI), Mass General Brigham Medical Group Suburban Massachusetts Inc (Newton, MA) and 1 more organization, listed in the Medicare section above. Each 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 William Oldham's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Oldham accept?

Health plans from Taro Health list William Oldham 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 William Oldham affiliated with any hospitals?

According to CMS data, William Oldham is affiliated with Rhode Island Hospital and The Miriam Hospital.

When was this NPI record last updated?

The NPPES record for William Oldham was last updated on April 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.