What is James Walter's NPI number?

James Walter's National Provider Identifier (NPI) is 1588984454, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is James Walter's specialty?

James Walter is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).

Where is James Walter located?

James Walter's practice location on file with NPPES is 676 N Saint Clair St Ste 2100, Chicago, IL 60611-2993.

What is James Walter's phone number?

The practice phone number listed in the NPPES registry for James Walter is (312) 695-1800.

Does James Walter accept Medicare?

James Walter is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is James Walter's NPI active?

Yes — James Walter's NPI (1588984454) is active in the NPPES registry as of the last update on 2025-08-15.

IndividualActiveAccepts Medicare

James Walter, MD

NPI 1588984454 · Pulmonary Disease Physician · Chicago, IL

Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)

James Walter, MD is a Pulmonary Disease Physician provider in Chicago, IL (NPI 1588984454).

Provider details

NPI number: 1588984454
Entity type: Individual
Primary specialty: Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: Yes
License: 036134956 (IL)

Specialties & taxonomies

Pulmonary Disease PhysicianPrimary207RP1001XLicense 036134956 (IL)
Allopathic & Osteopathic Physicians
Critical Care Medicine (Internal Medicine) Physician207RC0200XLicense 036134956 (IL)
Allopathic & Osteopathic Physicians
Hospitalist Physician208M00000XLicense A125681 (CA)
Allopathic & Osteopathic Physicians

Profile Score

Established profile(68/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure28% of score
16 yrs in NPPES registry
Profile completeness28% of score
100% of core fields populated
Practice footprint17% of score
4 documented practice locations
Medicare service volume (vs. specialty peers)28% of score
158 Medicare services, 2024 (ranked within specialty)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Critical Care, First 30-74 Minutes99291	122	$230
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233	23	$127
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232	13	$84

Typical Medicare-allowed amounts for these services range $84–$230 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.

Practice location

676 N Saint Clair St Ste 2100

Chicago, IL 60611-2993

Phone: (312) 695-1800

Fax: (312) 695-4741

Street-level locationGet directions

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Mailing address