Karen Mass, MD
NPI 1710179759 · Obstetrics & Gynecology Physician · Lake Forest, IL
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Mass, MD is a Obstetrics & Gynecology Physician provider in Lake Forest, IL (NPI 1710179759).
Provider details
- NPI number
- 1710179759
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036-093084 (IL)
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
18 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
1,553 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 254 | $132 |
| Pelvic Exam99459 | 244 | $23 |
| Screening 3d Breast Mammography77063 | 167 | $53 |
| Screening Mammography77067 | 167 | $130 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 106 | $13 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 104 | $91 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 109 | 48 |
| Valacyclovir Hclbrand: Valacyclovir | 75 | 25 |
| Alendronate Sodium | 70 | 20 |
| Raloxifene Hcl | 66 | 21 |
| Clotrimazole/Betamethasone Dipbrand: Clotrimazole-Betamethasone | 36 | 23 |
| Clobetasol Propionate | 17 | 12 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 14 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$123 across 7 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
- 2007-08-14
- Last updated
- 2024-03-07
- Certified
- 2022-09-22
Frequently asked questions
- What is Karen Mass's NPI number?
- Karen Mass's National Provider Identifier (NPI) is 1710179759, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Mass's specialty?
- Karen Mass is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Mass located?
- Karen Mass's practice location on file with NPPES is 840 S Waukegan Rd Ste 208, Lake Forest, IL 60045-2619.
- What is Karen Mass's phone number?
- The practice phone number listed in the NPPES registry for Karen Mass is (847) 295-0433.
- Does Karen Mass accept Medicare?
- Karen Mass is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Mass's NPI active?
- Yes — Karen Mass's NPI (1710179759) is active in the NPPES registry as of the last update on 2024-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.