Matthew Karulf, M.D.
NPI 1912109083 · Pulmonary Disease Physician · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Karulf, M.D. is a Pulmonary Disease Physician provider in Grand Rapids, MI (NPI 1912109083).
Provider details
- NPI number
- 1912109083
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD27862 (OR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
989 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Test to Determine Lung Volumes Using Sensors94726 | 95 | $12 |
| Test to Examine How Well the Lungs Exchange Gases94729 | 95 | $9 |
| Test to Measure Expiratory Airflow and Volume Changes Before and After Medication Administration94060 | 76 | $10 |
| Test to Determine Lung Volumes Using Sensors94726 | 64 | $12 |
| Test to Examine How Well the Lungs Exchange Gases94729 | 64 | $9 |
| Irrigation and Suction of Lung Airways to Obtain Cells Using an Endoscope31624 | 60 | $24 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tiotropium Br/Olodaterol Hclbrand: Stiolto Respimat | 52 | 12 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 33 | — |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 32 | — |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 25 | 13 |
| Tiotropium Bromidebrand: Spiriva Respimat | 24 | — |
| Fluticasone Propion/Salmeterolbrand: Fluticasone-Salmeterol | 16 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$676 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-06-01
- Last updated
- 2022-07-08
- Certified
- 2022-07-08
Frequently asked questions
- What is Matthew Karulf's NPI number?
- Matthew Karulf's National Provider Identifier (NPI) is 1912109083, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Karulf's specialty?
- Matthew Karulf is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Karulf located?
- Matthew Karulf's practice location on file with NPPES is 4100 Lake Dr Se, Grand Rapids, MI 49546-8292.
- What is Matthew Karulf's phone number?
- The practice phone number listed in the NPPES registry for Matthew Karulf is (616) 267-8244.
- Does Matthew Karulf accept Medicare?
- Matthew Karulf is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Karulf's NPI active?
- Yes — Matthew Karulf's NPI (1912109083) is active in the NPPES registry as of the last update on 2022-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.