Mark Jacob, M.D.
NPI 1063688497 · Pulmonary Disease Physician · Rockford, IL
Enrolled with Medicare as Practitioner - Critical Care (intensivists) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Jacob, M.D. is a Pulmonary Disease Physician provider in Rockford, IL (NPI 1063688497).
Provider details
- NPI number
- 1063688497
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4301086585 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
5 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
58 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 | 58 | $207 |
Typical Medicare-allowed amounts for these services range $207–$207 (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
Mailing address
Additional practice locations (4)
- 300 E Warwick DrAlma, MI 48801-1014Phone: (989) 774-1101
- 363 Fremont St Ste 100Battle Creek, MI 49017-3395Phone: (269) 245-5100
- 601 John St Ste M-510Kalamazoo, MI 49007-5341Phone: (269) 341-7762
- 160 Allen StMedical Staff OfficeRutland, VT 05701-4560Phone: (913) 909-7400
Registry dates
- Enumerated
- 2008-05-06
- Last updated
- 2024-12-27
- Certified
- 2024-12-27
Frequently asked questions
- What is Mark Jacob's NPI number?
- Mark Jacob's National Provider Identifier (NPI) is 1063688497, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Jacob's specialty?
- Mark Jacob is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Jacob located?
- Mark Jacob's practice location on file with NPPES is 1340 Charles St Ste 401, Rockford, IL 61104-2200.
- What is Mark Jacob's phone number?
- The practice phone number listed in the NPPES registry for Mark Jacob is (779) 696-6102.
- Does Mark Jacob accept Medicare?
- Mark Jacob is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Jacob's NPI active?
- Yes — Mark Jacob's NPI (1063688497) is active in the NPPES registry as of the last update on 2024-12-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.