Rank		N	Invalid	Ambiguous	Inconsistent
1	Oakland Southfield Physicians	966	1.97%	4.97%	1.76%
2	Corewell Health	16,604	0.14%	11.57%	0.26%
3	American Board of Osteopathic Medicine	12,998	0.02%	12.94%	0.11%
4	Trinity Health-Michigan	7,713	1.71%	11.85%	2.83%
5	Ascension Health	15,411	2.07%	12.85%	1.74%
6	Meridian Health Plan of Michigan	29,776	0.49%	18.30%	0.37%
7	Henry Ford Health System	17,575	0.19%	8.07%	11.88%
8	Tenet Health	12,022	3.31%	8.68%	9.05%
9	Michigan Healthcare Professionals	777	0.13%	14.80%	7.08%
10	Centers for Medicare & Medicaid Services	18,988,448	1.30%	11.48%	16.14%
11	Prime Healthcare	12,740	2.15%	12.96%	19.05%
12	Molina Healthcare	522,167	1.84%	15.08%	17.75%
13	McLaren Health Care	3,712	2.34%	10.08%	25.67%
14	Blue Cross Complete of Michigan	88,399	1.32%	16.77%	22.63%
15	University of Michigan Sparrow	🚫

Key:

N - Number of Provider/Location or Practice/Location combinations represented in source data
Invalid - Address is not recognized by the USPS.
Ambiguous - Address is incomplete. Needs a suite number or other detail to be precise.
Inconsistent - Using different label to represent the same location, e.g. If 7 records show "101 N Main" and 3 show "101 North Main St", the majority (7) are considered canonical, and 3 out of 10 (30%) would show as "Inconsistent".
🚫 - Data source does not provide location information

Rank	N	Invalid	Wrong NPI type	Wrong NPI	Deactivated	No NPI	Chart
1	Corewell Health	10,554				0.31%
2	Ascension Health	12,948		0.05%		0.29%
3	Molina Healthcare	34,135	0.00%	0.02%	0.02%	0.40%
4	University of Michigan Sparrow	986		0.10%		0.51%
5	Tenet Health	10,246	0.01%	0.14%	0.01%	0.50%
6	Prime Healthcare	7,573	0.07%	0.29%		0.36%	0.01%
7	Henry Ford Health System	9,574				0.32%	2.07%
8	Blue Cross Complete of Michigan	37,232	0.00%	0.77%	1.57%	0.29%
9	Centers for Medicare & Medicaid Services	9,852,180				3.63%
10	Trinity Health-Michigan	5,688	0.70%			0.19%	3.57%
11	McLaren Health Care	3,080	0.03%	0.16%		0.39%	20.13%
12	American Board of Osteopathic Medicine	🚫
13	Meridian Health Plan of Michigan	🚫
14	Michigan Healthcare Professionals	🚫
15	Oakland Southfield Physicians	🚫

Rank	N	Invalid	Ambiguous	Redundant	Inconsistent	Unmapped	Chart
1	Centers for Medicare & Medicaid Services	11,558,935						✅
2	Meridian Health Plan of Michigan	23,843		3.07%			1.51%
3	Blue Cross Complete of Michigan	43,540	2.12%	6.84%	0.27%	0.24%	0.41%
4	Oakland Southfield Physicians	928	0.86%	6.90%			2.16%
5	Tenet Health	13,363	0.86%	11.60%		0.05%	0.01%
6	University of Michigan Sparrow	916	0.22%	3.60%			11.46%
7	Trinity Health-Michigan	8,261	3.18%	10.87%	0.01%	0.01%	3.83%
8	American Board of Osteopathic Medicine	16,636	5.36%	6.95%		0.01%	5.90%
9	Henry Ford Health System	11,352	2.55%	15.68%			0.63%
10	Ascension Health	18,266	1.92%	7.71%	0.11%	0.04%	9.21%
11	Prime Healthcare	11,597	7.33%	11.95%	0.53%	0.03%	1.87%
12	Corewell Health	21,608	4.86%	7.26%	1.41%	1.80%	10.20%
13	Michigan Healthcare Professionals	676	5.77%	20.27%	0.15%
14	McLaren Health Care	4,099	0.93%	12.64%			13.83%
15	Molina Healthcare	45,299	0.45%	6.53%			24.36%

Rank	N	Invalid	Ambiguous	Redundant	Inconsistent	Unmapped	Chart
1	Michigan Healthcare Professionals	108		0.93%
2	Corewell Health	6,817	1.48%	5.69%			10.58%
3	American Board of Osteopathic Medicine	12,998		4.41%			17.26%
4	Henry Ford Health System	6,337	3.12%	13.78%	0.05%	0.08%	7.91%
5	Tenet Health	9,631	2.52%	8.35%	0.02%	0.01%	26.61%
6	Ascension Health	13,811	6.44%	3.38%	0.21%	0.59%	27.38%
7	Prime Healthcare	6,444	3.17%	5.74%	0.40%	0.45%	31.08%
8	McLaren Health Care	2,549	3.26%	8.43%			32.56%
9	Blue Cross Complete of Michigan	🚫
10	Centers for Medicare & Medicaid Services	🚫
11	Meridian Health Plan of Michigan	🚫
12	Molina Healthcare	🚫
13	Oakland Southfield Physicians	🚫
14	Trinity Health-Michigan	🚫
15	University of Michigan Sparrow	🚫

Rank	N	Invalid	Ambiguous	Redundant	Inconsistent	Unmapped	Chart
1	Trinity Health-Michigan	7,795	0.06%	1.89%
2	Michigan Healthcare Professionals	1,095	6.94%	19.82%
3	Prime Healthcare	396	33.33%	9.60%	1.26%	5.56%
4	Oakland Southfield Physicians	928	50.86%	3.02%			0.11%
5	Meridian Health Plan of Michigan	28,660	46.55%	13.06%	0.15%	0.31%
6	Tenet Health	1,743	45.32%	17.61%	0.23%	0.11%
7	Corewell Health	13,819	33.97%	31.28%	0.08%	0.10%	0.22%
8	McLaren Health Care	3,133	50.62%	16.34%	0.03%	0.03%	1.79%
9	American Board of Osteopathic Medicine	🚫
10	Ascension Health	🚫
11	Blue Cross Complete of Michigan	🚫
12	Centers for Medicare & Medicaid Services	🚫
13	Henry Ford Health System	🚫
14	Molina Healthcare	🚫
15	University of Michigan Sparrow	🚫

Rank	N	Invalid	Redundant	Inconsistent	Unmapped
1	Corewell Health	2,833	0.07%
2	Henry Ford Health System	3,993		0.15%	0.25%
3	Molina Healthcare	6,267	0.64%	0.34%	0.29%
4	Tenet Health	2,137	0.37%		0.94%
5	Ascension Health	3,620	1.35%
6	McLaren Health Care	215	1.40%		0.47%
7	American Board of Osteopathic Medicine	🚫
8	Blue Cross Complete of Michigan	🚫
9	Centers for Medicare & Medicaid Services	🚫
10	Meridian Health Plan of Michigan	🚫
11	Michigan Healthcare Professionals	🚫
12	Oakland Southfield Physicians	🚫
13	Prime Healthcare	🚫
14	Trinity Health-Michigan	🚫
15	University of Michigan Sparrow	🚫

Rank	N	Invalid	Ambiguous	Redundant	Inconsistent	Chart
1	Henry Ford Health System	15,191	8.66%			11.74%
2	Molina Healthcare	24,055	1.81%	8.34%	0.39%	30.90%
3	Tenet Health	16,327	7.20%			72.50%
4	Corewell Health	18,395		12.71%		70.30%
5	Prime Healthcare	43,607	0.65%	1.71%	0.00%	88.83%
6	Ascension Health	27,265		0.00%		99.99%
7	American Board of Osteopathic Medicine	🚫
8	Blue Cross Complete of Michigan	🚫
9	Centers for Medicare & Medicaid Services	🚫
10	McLaren Health Care	🚫
11	Meridian Health Plan of Michigan	🚫
12	Michigan Healthcare Professionals	🚫
13	Oakland Southfield Physicians	🚫
14	Trinity Health-Michigan	🚫
15	University of Michigan Sparrow	🚫

Rank	N	Invalid	Ambiguous	Redundant	Inconsistent	Unmapped	Chart
1	American Board of Osteopathic Medicine	18,013	0.12%				0.89%
2	Corewell Health	12,353	0.18%			0.28%	12.19%
3	Molina Healthcare	8,621	3.80%			0.01%	13.29%
4	Henry Ford Health System	11,395	0.67%	3.45%			14.87%
5	Ascension Health	15,380	0.41%	2.59%	0.01%	0.01%	65.49%
6	McLaren Health Care	2,225	9.66%	7.55%			54.11%
7	Blue Cross Complete of Michigan	🚫
8	Centers for Medicare & Medicaid Services	🚫
9	Meridian Health Plan of Michigan	🚫
10	Michigan Healthcare Professionals	🚫
11	Oakland Southfield Physicians	🚫
12	Prime Healthcare	🚫
13	Tenet Health	🚫
14	Trinity Health-Michigan	🚫
15	University of Michigan Sparrow	🚫

Rank	N	Invalid	Ambiguous	Redundant	Inconsistent	Chart
1	Michigan Healthcare Professionals	169	14.20%	19.53%	2.37%
2	Corewell Health	10,746	0.18%	0.16%		83.01%
3	Henry Ford Health System	12,128		0.13%		94.03%
4	American Board of Osteopathic Medicine	🚫
5	Ascension Health	🚫
6	Blue Cross Complete of Michigan	🚫
7	Centers for Medicare & Medicaid Services	🚫
8	McLaren Health Care	🚫
9	Meridian Health Plan of Michigan	🚫
10	Molina Healthcare	🚫
11	Oakland Southfield Physicians	🚫
12	Prime Healthcare	🚫
13	Tenet Health	🚫
14	Trinity Health-Michigan	🚫
15	University of Michigan Sparrow	🚫

Data supplied by Provider Harbor, current as of 2026-10-26.

Provider Directory Scorecards

Provider and Practice Location CMS National Provider Index (NPI) Specialty Medical School Practice Language Hospital Board Certification Residency