Theodore Welling, MD
NPI 1023109683 · Surgery Physician · La Jolla, CA
Enrolled with Medicare as Practitioner - Surgical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Theodore Welling, MD is a Surgery Physician provider in La Jolla, CA (NPI 1023109683).
Provider details
- NPI number
- 1023109683
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- C196248 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
6 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
29 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) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 18 | $186 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 11 | $171 |
Typical Medicare-allowed amounts for these services range $171–$186 (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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$19 across 1 record (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
Additional practice locations (5)
- 9300 Campus Point DrLa Jolla, CA 92037-1300Phone: (800) 926-8273Fax: (888) 539-8781
- 39000 Bob Hope DrRancho Mirage, CA 92270-3221Phone: (760) 346-7655Fax: (760) 773-1667
- 4303 La Jolla Village Dr Ste 2110San Diego, CA 92122-1396Phone: (800) 926-8273Fax: (888) 539-8781
- 200 W Arbor DrSan Diego, CA 92103-9000Phone: (800) 926-8273Fax: (888) 539-8781
- 1500 East Medical Center Dr2nd Floor Taubman Ctr Recp FAnn Arbor, MI 48109-5332Phone: (734) 936-5738
Registry dates
- Enumerated
- 2006-09-27
- Last updated
- 2025-11-17
- Certified
- 2025-11-17
Frequently asked questions
- What is Theodore Welling's NPI number?
- Theodore Welling's National Provider Identifier (NPI) is 1023109683, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Theodore Welling's specialty?
- Theodore Welling is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Theodore Welling located?
- Theodore Welling's practice location on file with NPPES is 3855 Health Sciences Dr, La Jolla, CA 92093-5332.
- What is Theodore Welling's phone number?
- The practice phone number listed in the NPPES registry for Theodore Welling is (800) 926-8273.
- Does Theodore Welling accept Medicare?
- Theodore Welling is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Theodore Welling's NPI active?
- Yes — Theodore Welling's NPI (1023109683) is active in the NPPES registry as of the last update on 2025-11-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.