Constance Marks, M.D.
NPI 1831398445 · Specialist · Joliet, IL
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Constance Marks, M.D. is a Specialist provider in Joliet, IL (NPI 1831398445).
Provider details
- NPI number
- 1831398445
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 036079703 (IL)
Specialties & taxonomies
Other Service Providers
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
4,048 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) |
|---|---|---|
| Automated Urinalysis Test81003 | 939 | $2 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 775 | $17 |
| Ultrasound Measurement of Bladder Capacity After Voiding51798 | 600 | $12 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 567 | $131 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 175 | $94 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Solifenacin Succinate | 325 | 102 |
| Mirabegronbrand: Myrbetriq | 187 | 57 |
| Tamsulosin Hcl | 136 | 52 |
| Finasteride | 88 | 31 |
| Ciprofloxacin Hcl | 62 | 57 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 53 | 40 |
| Estradiol | 47 | 34 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,658 across 71 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
- 2007-07-13
- Last updated
- 2023-11-30
- Certified
- 2023-11-30
Frequently asked questions
- What is Constance Marks's NPI number?
- Constance Marks's National Provider Identifier (NPI) is 1831398445, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Constance Marks's specialty?
- Constance Marks is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Constance Marks located?
- Constance Marks's practice location on file with NPPES is 1541 Riverboat Center Dr, Joliet, IL 60431-9341.
- What is Constance Marks's phone number?
- The practice phone number listed in the NPPES registry for Constance Marks is (815) 741-3825.
- Does Constance Marks accept Medicare?
- Constance Marks is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Constance Marks's NPI active?
- Yes — Constance Marks's NPI (1831398445) is active in the NPPES registry as of the last update on 2023-11-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.