Karl Gundersen, MD
NPI 1548362775 · Psychiatry Physician · Granite City, IL
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karl Gundersen, MD is a Psychiatry Physician provider in Granite City, IL (NPI 1548362775).
Provider details
- NPI number
- 1548362775
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036105102 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
212 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 123 | $138 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 89 | $75 |
Typical Medicare-allowed amounts for these services range $75–$138 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Duloxetine Hcl | 24 |
| Lamotrigine | 23 |
| Bupropion Hclbrand: Bupropion Xl | 22 |
| Escitalopram Oxalate | 21 |
| Citalopram Hydrobromidebrand: Citalopram Hbr | 20 |
| Alprazolam | 17 |
| Bupropion Hclbrand: Bupropion Hcl Sr | 16 |
| Lurasidone Hcl | 16 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-01
- Last updated
- 2012-08-14
Frequently asked questions
- What is Karl Gundersen's NPI number?
- Karl Gundersen's National Provider Identifier (NPI) is 1548362775, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karl Gundersen's specialty?
- Karl Gundersen is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Karl Gundersen located?
- Karl Gundersen's practice location on file with NPPES is 2120 Madison Ave, Granite City, IL 62040.
- What is Karl Gundersen's phone number?
- The practice phone number listed in the NPPES registry for Karl Gundersen is (618) 876-0653.
- Does Karl Gundersen accept Medicare?
- Karl Gundersen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karl Gundersen's NPI active?
- Yes — Karl Gundersen's NPI (1548362775) is active in the NPPES registry as of the last update on 2012-08-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.