Physician Profile
Unclaimed ProfileAbout LUDWIG
John Otto Louis Ludwig, MD is a healthcare provider in Portland, OR specializing in emergency medicine. According to Medicare claims data, John cared for 178 Medicare patients across 186 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (503) 494-7500
- Email not available
Practice Locations
3181 SW SAM JACKSON PARK RD
Portland, OR 97239
Procedures Most Often Billed to Medicare
186 services · 178 patients · 5 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Emergency department visit with moderate level of medical decision making | Office visit | 99284 |
72 |
| Emergency department visit with high level of medical decision making | Office visit | 99285 |
68 |
| Emergency department visit with low level of medical decision making | Office visit | 99283 |
20 |
| Critical care, first 30-74 minutes | Office visit | 99291 |
15 |
| Emergency department visit with straightforward medical decision making | Office visit | 99282 |
11 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other emergency medicines at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 4
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 23 related providers in 3 groups
Other emergency medicines in Portland 7
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2016 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Ludwig specialize in?
Dr. Ludwig is an emergency medicine in Portland, OR. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “EMERGENCY MEDICINE”.
NPI registry
Where is Dr. Ludwig located?
Dr. Ludwig is listed at 3181 SW SAM JACKSON PARK RD, Portland, OR 97239. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Ludwig's phone number?
The number on file is (503) 494-7500. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Ludwig's NPI number?
Dr. Ludwig's National Provider Identifier is 1619322658. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Ludwig go to medical school?
Dr. Ludwig attended Other, graduating in 2016. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Ludwig been practicing?
Dr. Ludwig has 10 years experience. Calculated from a graduation year of 2016, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Ludwig do most often?
According to Medicare billing data, Dr. Ludwig the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Ludwig confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Ludwig. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.