Mark Claus, M.D.
NPI 1518910686 · Allergy Physician · Brockton, MA
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Claus, M.D. is a Allergy Physician provider in Brockton, MA (NPI 1518910686).
Provider details
- NPI number
- 1518910686
- Entity type
- Individual
- Primary specialty
- Allergy PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 59634 (MA)
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
20 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
6,947 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 for Allergy Using Allergenic Extract95004 | 2,428 | $4 |
| Test for Allergy Using Allergenic Extract Injected Into Skin95024 | 1,213 | $8 |
| Test for Allergy Using Skin Patch95044 | 915 | $5 |
| Professional Service for Preparation and Provision of 1 Or More Antigens95165 | 613 | $15 |
| Professional Service for Multiple Injections of Allergen95117 | 612 | $13 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 279 | $91 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 36 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Montelukast Sodium | 585 | 199 |
| Fluticasone Propionate | 353 | 137 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 319 | 129 |
| Levocetirizine Dihydrochloride | 278 | 95 |
| Azelastine Hcl | 183 | 74 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 112 | 32 |
| Fluticasone/Vilanterolbrand: Breo Ellipta |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,444 across 88 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
- 2006-05-18
- Last updated
- 2008-02-04
Frequently asked questions
- What is Mark Claus's NPI number?
- Mark Claus's National Provider Identifier (NPI) is 1518910686, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Claus's specialty?
- Mark Claus is listed in the NPPES registry with a primary specialty of Allergy Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Claus located?
- Mark Claus's practice location on file with NPPES is 35 Pearl St, Brockton, MA 02301-2866.
- What is Mark Claus's phone number?
- The practice phone number listed in the NPPES registry for Mark Claus is (508) 584-6300.
- Does Mark Claus accept Medicare?
- Mark Claus is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Claus's NPI active?
- Yes — Mark Claus's NPI (1518910686) is active in the NPPES registry as of the last update on 2008-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.